{"id":10637,"date":"2026-03-19T14:55:31","date_gmt":"2026-03-19T14:55:31","guid":{"rendered":"https:\/\/www.truthforhealth.org\/?p=10637"},"modified":"2026-03-19T14:55:31","modified_gmt":"2026-03-19T14:55:31","slug":"dr-vliets-health-tip-the-vitamin-d-lie-normal-levels-are-dangerously-low-aim-for-above-70-or-risk-your-health","status":"publish","type":"post","link":"https:\/\/www.truthforhealth.org\/es\/2026\/03\/dr-vliets-health-tip-the-vitamin-d-lie-normal-levels-are-dangerously-low-aim-for-above-70-or-risk-your-health\/","title":{"rendered":"Dr. Vliet\u2019s Health Tip: The Vitamin D Lie:  &#8220;Normal&#8221; Levels Are Dangerously Low \u2013 Aim for Above 70 or Risk Your Health"},"content":{"rendered":"<p><strong><em>\u00a9 by Elizabeth Lee Vliet MD and Kathy Kresnik<\/em><\/strong><\/p>\n<p>Vitamin\u00a0D is probably the most important overlooked life saver and SHIELD in our health and resilience armamentarium! Ignoring its importance, and failing to check blood levels regularly, means you are playing Russian Roulette with your health.\u00a0 Both my medical experience over the last 40 years and current research studies confirm that for far too long, conventional \u201cwisdom\u201d has set target vitamin D levels far too low to achieve all the critical functions in the body that this wonder hormone provides.\u00a0 Yes, that\u2019s right.\u00a0 I said \u201chormone.\u201d \u201cVitamin\u201d D is actually a <em>hormone<\/em>, not a vitamin.\u00a0 I explained that in <a href=\"https:\/\/www.truthforhealth.org\/2024\/04\/health-tip-from-dr-vliet-featuring-trubiod3\/\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/www.truthforhealth.org\/2024\/04\/health-tip-from-dr-vliet-featuring-trubiod3\/&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw1Ke9naFGWkvEKA_nzQOsIC\">my earlier article on Vitamin D<\/a>.<\/p>\n<p>There are serious <em>myths<\/em> about the level of vitamin D you actually need.\u00a0 Tragically, doctors and institutional guidelines are still telling patients that Vitamin D levels between 20-30 ng\/mL are \u201cnormal.\u201d\u00a0 Even my own patients, for whom I am trying to get Vitamin D into optimal ranges, have primary care docs telling them they are \u201ctaking too much\u201d or their level is fine at 30!\u00a0 It is very frustrating for me.<\/p>\n<p>Big Medicine seems unwilling to admit that current research has shown for the last 25 years or more that Vitamin D stores need to be <strong><em>above 60 ng\/mL <\/em><\/strong>and <strong>ideally in the 70-90 ng\/mL range<\/strong>\u2014measured as 25 (OH) vitamin D in the blood.\u00a0 Globally, roughly half of people have suboptimal vitamin D by common bone\u2011health thresholds, and about 1 in 6 have deficient levels.<\/p>\n<p><strong>Keep in mind this key point:<\/strong> <strong>\u201cnormal\u201d on a lab range is NOT THE SAME as <em>optimal for your body needs!\u00a0 <\/em>Vitamin D deficiency is often the silent killer hiding behind what patients were told is a \u201cnormal\u201d lab result.\u00a0 <\/strong>Insufficient, or deficient, vitamin D stores are simply too critical to ignore.\u00a0 So today, I teach you what you need to know about why higher levels are critical to your health, how to get tested, and how to improve your vitamin D stores.<\/p>\n<p><strong>So How Did We Get Here? Why Vitamin D Intake Recommendations Miss the Mark<\/strong><\/p>\n<p>Many physicians focusing on health as more than just absence of disease have long recognized the crucial role Vitamin D plays in just about every system in the body.\u00a0 Current national guidelines recommend daily intakes for Vitamin D that are far too low for optimal health based on the most current studies of correlation between Vitamin D levels and various medical disorders. The official RDA of 600\u2013800 IU per day, set by the Institute of Medicine in 2011, was meant to keep almost everyone\u2019s vitamin D levels above 20 ng\/mL. However, later research found that this dose only helps the average person reach a <strong><em>minimum<\/em><\/strong> level, which means most people are way below the what we now know to be the <strong><em>optimal threshold of at least 60 ng\/mL<\/em><\/strong>.<\/p>\n<p>This original recommendation also only focused on bone health (and still is too low for even that!), not on vitamin D levels needed for other organ systems to function optimally.\u00a0 Scientists re-examined the data and discovered that a much higher dose\u2014often several thousand IU per day\u2014is needed to ensure adequate vitamin D levels for nearly everyone.<\/p>\n<p>Despite this, major health authorities have not raised their recommendations, either because of inertia, or because so many medical groups have not taken into account the newer research showing higher levels are needed for most conditions, or because there is more money to be made for Big Pharma pushing Rx medicines to treat\u00a0 diabetes, heart disease, cancer, osteoporosis and depression than there is in testing vitamin D and recommending over the counter supplements. and keep pushing outdated lab ranges.<\/p>\n<p>If you rely strictly on the low RDA of 600-800 IU per day from food and a multivitamin, and do not take any vitamin D supplements at all, you may not even reach minimal levels, much less optimal vitamin D levels. That\u2019s especially true for people with a higher BMI, or who spend little time outdoors, or live at northern latitudes.<\/p>\n<p>For better health, consider current vitamin D recommendations as a only as a minimum starting point and adjust your dose based on lab tests and individual needs\u2014often up to 5,000 IU or even more daily\u2014while keeping blood levels within safe limits unless your doctor advises otherwise.<\/p>\n<p><strong>Serum vitamin D stores are measured by the blood test 25 (OH) vitamin D, commonly expressed in ng\/mL.\u00a0 Do not be confused with levels expressed in nmol\/L, as these will be higher numbers but can be misleading because the unit is not the same we are typically using.\u00a0 Here are some common ranges and what they mean:<\/strong><\/p>\n<ul>\n<li><strong>Severe deficiency:<\/strong> &lt;10 ng\/mL, depending on the lab.\u00a0 Some use less than 20.<\/li>\n<li><strong>Deficiency: <\/strong>&lt; 20 ng\/mL (NIH\/FNB)<\/li>\n<li><strong>Insufficiency:<\/strong> ~21\u201330 ng\/mL (some doctors still accept this as \u201cnormal\u201d)<\/li>\n<li><strong>Generally adequate\/normal:<\/strong> above 50 ng\/mL (current studies)<\/li>\n<li><strong>Optimal: <\/strong>70-90 ng\/mL (many current experts, based on recent data)<\/li>\n<li><strong>Higher than needed, <\/strong>possible adverse effects: &gt;100 ng\/mL<\/li>\n<li><strong>Toxicity:<\/strong> &gt;150 ng\/mL (some labs use lower level for defining toxicity)<\/li>\n<\/ul>\n<p>The preferred test is 25\u2011hydroxyvitamin D [25(OH)D] because it reflects the body stores. \u00a01,25\u2011dihydroxyvitamin D is not used for checking vitamin D stores because it measures what is circulating in the blood at a given time, and is affected by many factors.\u00a0 The 1,25 dihydroxy vitamin D test is usually used just for specific settings (advanced kidney disease, granulomatous disease, certain hypercalcemia evaluations)<\/p>\n<p>Most primary care doctors still don\u2019t do routine screening for vitamin D testing, so you may need to specifically request this test. But with the lifestyle and work environments shifting towards much more indoor activities and less time outdoors for adequate sun exposure, along with fear of skin cancer from too much sunshine, we are seeing increasing numbers of people with vitamin D deficiencies.\u00a0 I recommend that people have a vitamin D test at least once a year.\u00a0 Then, after starting or changing vitamin D supplements, repeat 25(OH) D blood test no sooner than about 12 weeks, allowing a new steady state to be reached.<\/p>\n<p><strong>The Bottom Line: <\/strong><\/p>\n<ul>\n<li>Low vitamin D levels are common because Big Medicine recommendations and most doctors haven\u2019t kept up with new science showing levels higher than 50-60\u00a0 ng\/mL are crucial.<\/li>\n<li>Many people need much more than 600\u2013800 IU\/day to avoid both vitamin D deficiency and Vitamin D <em>insufficiency<\/em>.<\/li>\n<li>Sun exposure, body weight, and individual metabolism affect how much vitamin D you need, and every person is different \u2013 blood tests help decide what you need.<\/li>\n<li>It is imperative to talk to your doctor and request a current blood test for the level of vitamin stores, 25 (OH) vitamin D.\u00a0 Then adjust your supplement dose to reach <em>optimal <\/em>level for health.<\/li>\n<li>You cannot aim for just a minimum Vitamin D level.\u00a0 That will lead to subtle ongoing damage to your bone and overall health. Remember, diabetes, heart disease, bone loss, and even cancers are all increased in people with low vitamin D stores.<\/li>\n<\/ul>\n<p><strong>Low Vitamin D and the Silent Calcium Crisis: Low Levels Steal Bone Health<\/strong><\/p>\n<p>Vitamin D and calcium are also closely linked in maintaining bone health and proper functioning of many bodily processes including muscle function, and overall metabolic balance. Many people have a vague understanding that vitamin D helps with calcium absorption in a way that plays a role in healthy bone. But most people, and even many doctors, don\u2019t understand the details of this relationship\u2014and what happens when vitamin D is lower than what the body needs.\u00a0 So, for today\u2019s Health Tip, I also explain how vitamin D deficiency impacts calcium levels, why serum calcium is often preserved until deficiency is severe, and the adverse health effects on bone and other organs that can occur in these situations of low vitamin D causing abnormal calcium metabolism.<\/p>\n<p>I described the Vitamin D ranges above. Normal total serum calcium is about 8.5\u201310.2 mg\/dL. Serum calcium has a narrow range and is tightly controlled by your body when the parathyroid glands are operating normally.\u00a0 But when vitamin D levels are suboptimal, calcium metabolism is disrupted.<\/p>\n<p><strong>How Does Vitamin D Affect Calcium?<\/strong><\/p>\n<p>Vitamin D plays an essential role in helping the intestines absorb calcium and phosphate from the foods we eat. Without enough vitamin D, your gut cannot efficiently absorb these minerals, even if your dietary intake is adequate. <strong>This is critical point: <em>over time, a lack of vitamin D can gradually deplete your body\u2019s calcium stores, even if you are consuming enough calcium in your diet.<\/em><\/strong><\/p>\n<p>This occurs because your body has built-in mechanisms to keep the calcium in your blood (serum calcium) within a normal range for as long as possible. When vitamin D is low, your intestines absorb less calcium, but your body compensates through the action of parathyroid hormone (PTH). A small drop in blood calcium triggers the release of PTH, which works to maintain serum calcium by increasing calcium reabsorption in the kidneys and releasing calcium from your bones. As a result, serum calcium typically stays within normal limits during mild or early vitamin D deficiency, but the rest of the body is being slowly damaged, and silently losing bone.<\/p>\n<p><strong>Signs of Parathyroid Compensation for Low Vitamin D<\/strong><\/p>\n<p>In mild or early cases of vitamin D insufficiency\/deficiency, blood tests may show normal serum calcium but elevated or high-normal PTH. Other changes can include low-normal phosphate and higher levels of alkaline phosphatase (ALP), an enzyme linked to bone turnover. These laboratory findings can indicate that the body is working harder to maintain calcium balance, and may be losing bone, even if there are no symptoms yet.<\/p>\n<p>In prolonged or severe vitamin D deficiency the body\u2019s compensatory mechanisms may no longer be enough. At this stage, the intestines cannot absorb enough calcium to meet the body&#8217;s needs, even with high PTH levels, and true hypocalcemia (low blood calcium) can develop. This condition can lead to symptoms such as muscle cramps, tingling, and, in severe cases, cardiac arrythmias, heart attacks, or even seizures.<\/p>\n<p>Some individuals with low vitamin D cannot mount a proper PTH response due to underlying medical conditions, such as certain types of parathyroid disease or kidney disorders. In these cases, serum calcium may drop sooner and more noticeably, as the body cannot compensate for the lack of vitamin D and may present with symptoms of hypocalcemia despite only moderate vitamin D deficiency.\u00a0 All of these situations are serious, and potentially life-threatening if not addressed and corrected.<\/p>\n<p><strong>WARNING \u2013 BE PROACTIVE! If you have risk factors for vitamin D deficiency\u2014such as limited sun exposure, darker skin, or certain dietary restrictions\u2014it is especially important talk to your doctor about monitoring lab levels:<\/strong> \u00a0<strong>25-hydroxyvitamin D (25(OH)D), PTH, calcium (both total and ideally ionized), phosphate, and ALP together<\/strong>. This combination of markers gives a more comprehensive view of how vitamin D status is influencing calcium metabolism and ultimately whether or not you are losing bone.<\/p>\n<p><strong>The Problem Is Significant and Needs to be Taken Seriously <\/strong><\/p>\n<p>Earlier in this health tip I said that roughly half of people worldwide have suboptimal vitamin D by common bone\u2011health thresholds, and about 1 in 6 have deficient levels. And this is if you follow the defined \u201csuboptimal\u201d level around 20 ng\/mL. If you use a more generous \u201cinsufficiency\u201d cutoff like 30 ng\/mL\u2014still way too low based on my review of current research\u2014then 75%\u00a0of people worldwide are below that level. No wonder COVID illness caused such damage. But Big Medicine and Big Government did not tell the public that simply greatly increasing vitamin D intake (and sun exposure) could have reduced the COVID death toll dramatically.<\/p>\n<p>Today\u2019s research shows that people with the lowest risk of serious conditions (diabetes, heart disease, cancer, osteoporosis) have Vitamin D levels in the top quartile of the reference range: levels of above 60 ng\/mL and ideally in the 70-90 ng\/mL range.\u00a0 I tell my patients that <em>optimal vitamin D means a level between 80-90 ng\/mL.\u00a0 <\/em>That\u2019s my goal personally for me as well.<\/p>\n<p><strong>But in the United States we find much more dismal and alarming stats:<\/strong><\/p>\n<ul>\n<li>NHANES 2011\u20132014 <a href=\"https:\/\/jamanetwork.com\/journals\/jama\/fullarticle\/2778487\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/jamanetwork.com\/journals\/jama\/fullarticle\/2778487&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw2UodVGmVn_i1_j3moNa_Pm\">data show<\/a> about\u00a05%\u00a0of US residents \u22651 year have 25(OH)D &lt;12 ng\/mL and\u00a018%\u00a0between 12\u201319 ng\/mL; together, ~23% are &lt;20 ng\/mL.<\/li>\n<li>Several US adult <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3755751\/\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3755751\/&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw3QCZCVhuK5XAUnmjKo6c4i\">cohorts report<\/a> roughly\u00a039%\u00a0with \u226420 ng\/mL and about\u00a064%\u00a0with \u226430 ng\/mL, depending on age, ethnicity, and assay.<\/li>\n<li>Another <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC7091696\/\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC7091696\/&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw1H3Ymz2vunh3J1Pw0OaAo8\">major review<\/a> (\u201cVitamin D deficiency 2.0\u201d) reports similar patterns and notes that 25(OH)D &lt;20 ng\/mL is common in 24% of the US, 37% of Canadians, and 40% of Europeans, using standardized assays.<\/li>\n<\/ul>\n<p><strong>Warning: Vitamin D Levels less than 30 ng\/mL are too low for bone and overall health. You really need to be proactive on this!<\/strong><\/p>\n<p>Based on more current studies, Vitamin D below about 30 ng\/mL is considered inadequate for bone and overall health and is linked to adverse health effects in multiple systems, not just calcium and bone. We know that chronic low vitamin D impairs calcium and phosphate absorption, driving secondary hyperparathyroidism. This leads to soft bones (osteomalacia), reduced bone mineral density, and higher fracture risk. It contributes to proximal muscle weakness and pain, poorer balance, and increased falls, especially in older adults.<\/p>\n<p>But suboptimal vitamin D levels damage the entire body. Pooled RCT data suggest daily vitamin D3 supplementation produces a reduction in all\u2011cause mortality.\u00a0 Suboptimal vitamin D is associated with higher risk of cardiovascular disease, diabetes, and some cancers.\u00a0 Here are some of the broader effects on the whole body when Vitamin D is too low:<\/p>\n<p><strong>Immune and infection risk:<\/strong><\/p>\n<ul>\n<li>Vitamin D receptors are expressed in many immune cells, and vitamin D modulates innate and adaptive <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC7397283\/\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC7397283\/&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw1UFOnZyYRj8k8_gRhMK1f_\">immune responses<\/a>.<\/li>\n<li>We saw during COVID that individuals with low vitamin D levels were more severely affected and had higher death rates.\u00a0 Multiple observational studies and meta-analyses (2020\u20132023) consistently show that vitamin D levels above 50-60 ng\/dL are associated with significantly lower risk of severe COVID-19 outcomes, including hospitalization and mortality \u2014 with some cohorts reporting near-100% protection at that threshold. (<em>e.g., Entrenas Castillo et al., Journal of Steroid Biochemistry, 2020; meta-analyses in Nutrients and The Lancet).<\/em><\/li>\n<li>Low levels have been associated with higher rates of respiratory infections and with autoimmune <a href=\"https:\/\/www.webmd.com\/diet\/vitamin-d-deficiency\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/www.webmd.com\/diet\/vitamin-d-deficiency&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw1ZE7mNK5Zbxxrh8Cmqj_NP\">conditions<\/a>.<\/li>\n<\/ul>\n<p><strong>Cardiometabolic health and mortality:<\/strong><\/p>\n<ul>\n<li>Vitamin D Deficiency and insufficiency are associated with greater risks of cardiovascular disease, type 2 diabetes, and all\u2011cause mortality in <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC2912737\/\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC2912737\/&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw0Pgjw0jD-32z9F7ti0JnGy\">cohort studies<\/a>.<\/li>\n<li>In older adults, having both low 25(OH)D and high hs\u2011CRP roughly doubles all\u2011cause and cardiovascular mortality risk versus people who do not have either abnormality.\u00a0 That data suggests an interaction between vitamin D status and systemic inflammation.<\/li>\n<\/ul>\n<p><strong>Cancer and cell regulation:<\/strong><\/p>\n<ul>\n<li>The vitamin D receptor (VDR) is widely expressed in non\u2013calcium\u2011regulating tissues, and vitamin D signaling influences cell proliferation, differentiation, and <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC12790760\/\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC12790760\/&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw3qnnRHzB4mQc7m0CaWKrtW\">angiogenesis<\/a>.<\/li>\n<li>Low 25(OH)D is epidemiologically linked to higher incidence or poorer prognosis of several cancers, and one large trial suggested vitamin D3 may reduce progression to advanced <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5440113\/\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5440113\/&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw1wv_enAF7veGNZIATyGoP6\">cancer<\/a><\/li>\n<\/ul>\n<p><strong>Barriers, skin, and other tissues:<\/strong><\/p>\n<ul>\n<li>Vitamin D and Vitamin D Receptor signaling helps maintain epithelial and endothelial barrier integrity in skin, gut, lung, and other organs, partly via tight junction proteins.<\/li>\n<li>Deficiency is <a href=\"https:\/\/www.medicinenet.com\/vitamin_d_deficiency\/article.htm\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/www.medicinenet.com\/vitamin_d_deficiency\/article.htm&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw0_CRx281puREEDnu4Jxm6h\">associated<\/a> with chronic musculoskeletal pain, fatigue, depressed mood, and slower wound healing, though these are nonspecific and may have other causes in addition to low vitamin D. Lab tests are needed to clarify the various causes.<\/li>\n<\/ul>\n<p><strong>Symptoms of low and deficient levels of vitamin D<\/strong><\/p>\n<p>Vitamin D deficiency typically does not cause obvious symptoms at first.\u00a0 When symptoms do occur, they are usually <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK532266\/\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK532266\/&amp;source=gmail&amp;ust=1773620792490000&amp;usg=AOvVaw2mhYn6ERTNlzYbXzPV32Ck\">musculoskeletal and sometimes quite nonspecific<\/a>. People at risk for low vitamin D include those with limited sun exposure, darker skin, malabsorption, obesity, chronic kidney or liver disease, people taking certain medicines, such as anticonvulsants, steroids, and fat-blockers.\u00a0 Symptoms also may vary based on age:<\/p>\n<p><strong>Children and infants<\/strong><strong>:<\/strong><\/p>\n<ul>\n<li>Irritability, delayed milestones, and poor growth.<\/li>\n<li>Signs of Rickets: bowed legs, widened wrists, soft skull, delayed tooth eruption.<\/li>\n<\/ul>\n<p><strong>Adolescent and Adult general symptoms<\/strong><strong>:<\/strong><\/p>\n<ul>\n<li>Diffuse bone pain or deep ache (spine, hips, ribs, legs).<\/li>\n<li>Proximal muscle weakness (difficulty climbing stairs, rising from a chair, walking distance).<\/li>\n<li>Muscle aches, cramps, twitches, or tremor.\u00a0(More on this below)<\/li>\n<li>Fatigue, low energy, feeling \u201crun down.\u201d<\/li>\n<li>Increased falls and fractures, especially in older adults.<\/li>\n<li>Poor sleep and nonspecific malaise.<\/li>\n<li>More frequent infections or \u201cgetting sick easily,\u201d reflecting immune effects.<\/li>\n<\/ul>\n<p><strong>Neurologic, sensory and mood symptoms:<\/strong><\/p>\n<ul>\n<li>Tingling or \u201cpins and needles\u201d in hands or feet (from associated hypocalcemia in more severe cases).<\/li>\n<li>Muscle spasms or tetany in marked deficiency, sometimes with low calcium.<\/li>\n<li>Low mood, irritability, or depressive symptoms.<\/li>\n<\/ul>\n<p><strong>Low vitamin D leads to low calcium symptoms (cramps, tetany):<\/strong><\/p>\n<p>Severe or prolonged vitamin D deficiency can lead to true hypocalcemia, which in turn can cause cramps, paresthesia (<strong>abnormal skin sensations<\/strong>\u00a0such as tingling, prickling, burning, or crawling), and even tetany (seizures), but this is usually a later and more severe manifestation.<br \/>\nAs we discussed, vitamin D deficiency reduces intestinal calcium absorption, which can eventually drop ionized calcium enough to cause hypocalcemia. When ionized calcium falls below roughly 4.3 mg\/dL (about 1.1 mmol\/L), patients can develop the classic hypocalcemic spectrum: \u201cpins and needles,\u201d tingling around mouth and fingers, toes, hands and feet, muscle cramps, spasms in the hands and feet, laryngospasm, and tetany that improves with calcium plus vitamin D replacement.<\/p>\n<p><strong>Mild vs severe deficiency<\/strong><\/p>\n<ul>\n<li><strong>Mild\u2013moderate deficiency<\/strong> often has normal serum calcium (due to secondary hyperparathyroidism) and may cause vague muscle aches or weakness rather than frank tetany.<\/li>\n<li><strong>Cramps in people with low vitamin D<\/strong> can be from a mix of mechanisms: subtle hypocalcemia, direct effects of vitamin D on muscle function, and sometimes concurrent low magnesium or other factors.<\/li>\n<\/ul>\n<p><strong>ACTION STEPS:<\/strong> <strong>If you have recurrent cramps, tingling, or any signs suggestive of seizure, have your physician check serum calcium (total and ideally ionized), magnesium, PTH, and 25<\/strong><strong>\u2011<\/strong><strong>OH vitamin D together to clarify whether low vitamin D has progressed to clinically significant hypocalcemia.<\/strong><\/p>\n<p><strong>Dietary Suggestions for Increasing Vitamin D Intake and Absorption<\/strong><\/p>\n<p>Diet can support vitamin D status, but even excellent intake rarely prevents the need for taking supplements, especially for people living in areas with limited sunlight or more northern latitudes. Here are practical ways to boost both intake and absorption.<\/p>\n<p><strong>Best food sources of vitamin D<\/strong>: <strong>Focus on foods naturally rich + fortified staples.<\/strong><\/p>\n<ul>\n<li><strong>Fatty fish:<\/strong> salmon, mackerel, herring, sardines, trout, and canned tuna.<\/li>\n<li><strong>Fish liver oils:<\/strong> e.g., cod liver oil (very concentrated; watch vitamin A load).<\/li>\n<li><strong>Egg yolks:<\/strong> more if hens are pasture\u2011raised or fed vitamin D\u2013enriched feed.<\/li>\n<li><strong>Beef liver and some red meats<\/strong>: modest amounts but nutritionally dense.<\/li>\n<li><strong>UV<\/strong><strong>\u2011<\/strong><strong>exposed mushrooms:<\/strong> maitake, portobello, shiitake grown\/treated under UV.<\/li>\n<li><strong>Fortified foods:<\/strong> cow\u2019s milk, many plant milks (soy, oat, almond), some yogurts, margarines, breakfast cereals, and some orange juices\u2014check labels for \u201cvitamin D\u201d and IU per serving.<\/li>\n<\/ul>\n<p><strong>GUIDELINE: <\/strong>A single serving of fatty fish can easily provide a large fraction of the standard 600\u2013800 IU \u201cdaily value,\u201d while most fortified foods contribute ~80\u2013150 IU per serving.<\/p>\n<p>For example, Wild salmon ~3.5 oz: about 600\u20131,000 IU on average,\u00a0\u00a0 often providing 75\u2013&gt;100% of 600\u2013800 IU in a single serving. Other fatty fish (mackerel, herring, sardines, trout) ~3 oz: typically ~200\u2013500 IU, around 25\u201380% of 600\u2013800 IU.<\/p>\n<p><strong>Strategies to Better Absorb &amp; Utilize Vitamin D:<\/strong><\/p>\n<ul>\n<li><strong>Eat it with fat:<\/strong> Vitamin D is fat\u2011soluble, so include healthy fats (e.g., olive oil, avocado, nuts, whole eggs, fatty fish) in the same meal.<\/li>\n<li><strong>Spread intake across meals:<\/strong> Regular exposure (fish a few times weekly, daily fortified foods) supports steadier status more than sporadic \u201cvitamin D meals.\u201d<\/li>\n<li><strong>Take Vitamin D with calcium foods:<\/strong> This doesn\u2019t increase D absorption, but supports bone\/mineral metabolism (e.g., sardines with bones, salmon with bones, dairy or fortified plant milks, leafy greens).<\/li>\n<\/ul>\n<p><strong>Sample meals to emphasize obtaining Vitamin D from food:<\/strong><\/p>\n<ul>\n<li>Breakfast: Omelet with 2\u20133 eggs plus fortified dairy milk.<\/li>\n<li>Lunch: Fortified yogurt or kefir<\/li>\n<li>Dinner: 3\u20134 oz salmon or mackerel; side of saut\u00e9ed greens.<\/li>\n<li>Additional suggestions: 1 tsp cod liver oil or \u00bd to 1 cup fortified orange juice.<\/li>\n<\/ul>\n<p><strong>Factors that reduce absorption or increase Vitamin D needs<\/strong>:\u00a0 Even with good diet, some people need more vitamin D under certain conditions or taking certain medicines. In these settings, diet alone almost never achieves and maintains target 25(OH)D levels; supplementation plus lab monitoring is typically required.<\/p>\n<ul>\n<li><strong>Higher body fat percentage:<\/strong> Vitamin D gets taken up and held inside fat tissue, reducing how much is freely available in the blood and for other tissues. Because more of it is \u201cparked\u201d in adipose tissue, less circulates to be immediately bio-available to cells.\u00a0 <strong><em>People with higher percentage of body fat commonly have lower serum 25(OH)D and often need higher doses to reach optimal blood levels.<\/em><\/strong><\/li>\n<li><strong>Malabsorption<\/strong>: Celiac, Inflammatory bowel disease, bariatric surgery, chronic pancreatitis, cholestatic liver disease, fatty liver disease.<\/li>\n<li><strong>Medications:<\/strong> Some anticonvulsants, glucocorticoids, rifampin, and some HIV meds increase <strong>enzymatic breakdown of vitamin D and its active metabolites<\/strong>\u00a0in the body, which means\u00a0<strong>25(OH)D is cleared faster<\/strong>, so serum levels drop unless intake\/synthesis is higher.<\/li>\n<li><strong>Very low<\/strong><strong>\u2011<\/strong><strong>fat diets or fat<\/strong><strong>\u2011<\/strong><strong>blocking meds<\/strong>: Orlistat and similar agents reduce absorption of fat\u2011soluble vitamins.<\/li>\n<\/ul>\n<p><strong>Strategy to Optimize Vitamin D: Diet + Outdoor Lifestyle + Quality Supplements<\/strong><\/p>\n<p>Targeting a blood level of 25 (OH) vitamin D in the <strong><em>optimal range of ABOVE 60 ng\/mL <\/em>( ideally 80-90 ng\/mL) <\/strong>means you are going to need to add a high quality D3 in olive oil supplement for two reasons: 1) most Americans do not eat enough of the Vitamin D-rich foods each day to reach these levels, and 2) most Americans are not out in the sun without sunscreen enough time each day, or at the right latitude, to achieve optimal Vitamin D levels.<\/p>\n<p><strong>It is Important to Supplement with Quality Products<\/strong><\/p>\n<p>I have recommended <strong><em>Vitamin D3 in olive oil capsules<\/em><\/strong> to my patients throughout my medical career.\u00a0 That is why I have included\u00a0<strong>TruBioD3\u2122<\/strong>\u00a0in my\u00a0<strong>Resilience<\/strong>\u00a0<strong>Formula<\/strong>.\u00a0 I have found over many years of tracking blood levels for patients using different commercial Vitamin D products that sublingual drops, hard tables\/caplets, and capsules that use other types of oil (sunflower, soy, safflower, canola oil, etc) as the carrier for fat-soluble Vitamin D3 simply do not bring up the vitamin D levels adequately \u2013so people end up wasting money, and lose time and health benefits because they think vitamin D is improving, and it actually isn\u2019t.<\/p>\n<p>You really do need to monitor the proper vitamin D blood level at least once a year to know that your Vitamin D stores are actually in the optimal range. they are getting better vitamin D!<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-10639\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-layzr=\"https:\/\/www.truthforhealth.org\/wp-content\/uploads\/2026\/03\/DandD-1024x552.jpg\" alt=\"\" width=\"1020\" height=\"550\" \/><\/p>\n<p><a href=\"https:\/\/shoptruthforhealth.com\/products\/trubiod3?variant=46445901152578\"><strong>BUY TruBioD3 NOW!<\/strong><\/a><a href=\"https:\/\/shoptruthforhealth.com\/products\/trubiod3?variant=46445901152578\">\u00a0<\/a><\/p>\n<p><strong>TruBioD3 contains vitamin D3 (cholecalciferol) with extra virgin olive oil in convenient soft gels. <\/strong>Vitamin D3 is the bioidentical form of vitamin D synthesized in the body from cholesterol, following activation by the UV rays in sunlight. This form is excellent for maintaining healthy levels of vitamin D stores in the body.<\/p>\n<p><a href=\"https:\/\/shoptruthforhealth.com\/products\/truopti-d3-k2%E2%84%A2\"><strong>BUY\u00a0TruOptD3+K2 NOW!<\/strong><\/a><\/p>\n<p><strong>TruOptD3+K2 provides 5000 IU of vitamin D3 (cholecalciferol), the identical form in which vitamin D is derived in the body from cholesterol and synthesized by sunlight on the skin.<\/strong> TruOpti D3+K2\u2122 also features K2 as menaquinone-7 (MK-7), a highly bioavailable and bioactive form of K2. \u00a0Taking vitamin D3 and vitamin K2 together support bone health better and lowers the risk of calcium ending up in the wrong places (vessels and soft tissues) and not the bones, where we want it.<\/p>\n<table width=\"100%\">\n<tbody>\n<tr>\n<td>\n<table width=\"100%\">\n<tbody>\n<tr>\n<td><strong>For more detailed information on supplementing with Vitamin D3 check out my original Vit D health tip: <\/strong><a href=\"https:\/\/www.truthforhealth.org\/2024\/04\/health-tip-from-dr-vliet-featuring-trubiod3\/\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/www.truthforhealth.org\/2024\/04\/health-tip-from-dr-vliet-featuring-trubiod3\/&amp;source=gmail&amp;ust=1773620792491000&amp;usg=AOvVaw2AeR39rAiDCKfYDoyA6YI-\"><strong>https:\/\/www.truthforhealth.org\/2024\/04\/health-tip-from-dr-vliet-featuring-trubiod3\/<\/strong><\/a><\/p>\n<p>I encourage you to consider our other natural medicines with our top quality, cGMP-compliant professional formulas:<strong><em> TruMitochondrial\u2122 Boost,\u00a0 TruNAC\u2122, Tru BioD3, Tru B\u2122 Complex Full Spectrum, TruZinc\u2122, TruC with BioFlavonoids\u00a0 <\/em>(Natural sourced Vitamin<em> C with complete Bioflavonoids), and TruProBiotic\u2122 Daily <\/em><\/strong>to replenish critical bifidobacteria depleted by COVID shots, viral illnesses, and antibiotic therapy.<\/p>\n<p>All Truth for Health Foundation Products Meet or Exceed cGMP Quality Standards, the highest quality standard for supplements sold in the USA. <strong><em>For more information, references from studies are listed in the Product Data Sheets for each product, available on our website.<\/em><\/strong>\u00a0 Check us out at <a href=\"http:\/\/www.TruthforHealth.org\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=http:\/\/www.TruthforHealth.org&amp;source=gmail&amp;ust=1773620792491000&amp;usg=AOvVaw2U_SLNvFGyuEkB8Nh526Po\">www.TruthforHealth.org<\/a> Click on tab for Store OR <a href=\"http:\/\/www.shopTruthforHealth.com\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=http:\/\/www.shopTruthforHealth.com&amp;source=gmail&amp;ust=1773620792491000&amp;usg=AOvVaw16DWfwXwSbpz4G5KfQjx2p\">www.shopTruthforHealth.com<\/a><\/p>\n<p><strong>CAUTION:<\/strong> As always, we urge you to avoid supplements without checking knowledgeable sources to evaluate your medical situation, proper lab tests to verify what is needed, and to make sure to avoid adverse interactions with prescription medicines and other supplements you take.\u00a0 Under medical practice regulations, we are unable to answer individual medical questions or make specific individual supplement recommendations for people who are not established patients of Dr. Vliet\u2019s independent medical practice (<a href=\"http:\/\/www.ViveLifeCenter.com\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=http:\/\/www.ViveLifeCenter.com&amp;source=gmail&amp;ust=1773620792491000&amp;usg=AOvVaw3qtRoTrGLLRhD32xnubWmF\">www.ViveLifeCenter.com<\/a>).<\/p>\n<p><strong>To Your good health and improving resilience!<\/strong><br \/>\n<strong>Elizabeth Lee Vliet, MD<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table width=\"100%\">\n<tbody>\n<tr>\n<td>\n<table width=\"100%\">\n<tbody>\n<tr>\n<td><a href=\"https:\/\/www.truthforhealth.org\/category\/health-tips\/\"><u><strong>C<\/strong><em><strong>lick here to read Dr. Vliet\u2019s Health Tips<br \/>\non these and more products.<\/strong><\/em><\/u><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00a9 by Elizabeth Lee Vliet MD and Kathy Kresnik Vitamin\u00a0D is probably the most important overlooked life saver and SHIELD in our health and resilience armamentarium! Ignoring its importance, and &hellip; <\/p>","protected":false},"author":21,"featured_media":10638,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[222],"tags":[],"class_list":["post-10637","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health-tips","fadeIn","image-hover-transition-effect","latest_post"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dr. Vliet\u2019s Health Tip: The Vitamin D Lie: &quot;Normal&quot; Levels Are Dangerously Low \u2013 Aim for Above 70 or Risk Your Health - Truth for Health Foundation<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.truthforhealth.org\/es\/2026\/03\/dr-vliets-health-tip-the-vitamin-d-lie-normal-levels-are-dangerously-low-aim-for-above-70-or-risk-your-health\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dr. Vliet\u2019s Health Tip: The Vitamin D Lie: &quot;Normal&quot; Levels Are Dangerously Low \u2013 Aim for Above 70 or Risk Your Health - Truth for Health Foundation\" \/>\n<meta property=\"og:description\" content=\"\u00a9 by Elizabeth Lee Vliet MD and Kathy Kresnik Vitamin\u00a0D is probably the most important overlooked life saver and SHIELD in our health and resilience armamentarium! 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