Checked video

How Vitamin D Affects Every Organ and Tissue — 15 claims checked against research

Watch the original · Dr. Eric Berg DC15 claims checked of 66 found

What the research says about the claims

The video makes 66 checkable claims. This page covers the 15 with the strongest research behind them, in the order they come up.

15 · Supported by research
01Supported by research

Vitamin d receptors are present in nearly every cell of the human body.

“now vitamin d receptors are in almost every single cell if not every single cell of your entire body”

Multiple provided sources confirm that vitamin D receptors (VDR) are ubiquitously expressed across a wide variety of human tissues and organs, supporting the claim that they are present in nearly every cell.

Watch this moment
02Supported by research

Vitamin d functions as a hormone, not strictly a vitamin.

“and in reality though vitamin d is not really a vitamin it's a hormone”

The provided evidence consistently describes vitamin D as a steroid hormone that is synthesized endogenously and acts via receptors, distinguishing it from the traditional definition of a vitamin.

Watch this moment
03Supported by research

Vitamin d deficiency can lead to sleep disturbances by affecting the circadian rhythm and sleep centers in the brain.

“if you're deficient in vitamin d you're not going to sleep at night vitamin d helps the circadian rhythm it helps the sleep centers in your brain”

The provided evidence indicates that vitamin D receptors are located in brain regions involved in sleep regulation (such as the suprachiasmatic nucleus) and that vitamin D deficiency is associated with sleep disturbances and altered sleep-wake cycles.

Watch this moment
04Supported by research

Vitamin d deficiency can disrupt sleep by affecting the circadian rhythm and sleep centers in the brain, specifically the suprachiasmatic nucleus.

“if you're deficient in vitamin d you're not going to sleep at night vitamin d helps the circadian rhythm it helps the sleep centers in your brain and that center is called the super charismatic nucle…”

Multiple studies indicate that vitamin D receptors are expressed in sleep-regulating brain regions, including the suprachiasmatic nucleus, and that deficiency is associated with disrupted sleep and circadian rhythms.

Watch this moment
05Supported by research

Vitamin d deficiency is consistently observed in individuals with alzheimer's, parkinson's, and dementia.

“in alzheimer's parkinson's dementia there's always a vitamin d deficiency”

Evidence consistently shows an association between vitamin D deficiency and an increased risk or incidence of dementia and Alzheimer's disease, though causality remains a subject of ongoing investigation.

Watch this moment
06Supported by research

Vitamin d significantly influences mood.

“your mood is greatly influenced by vitamin d”

Multiple studies indicate that vitamin D levels are associated with mood disorders, with evidence suggesting that supplementation can improve mood in deficient individuals, particularly those with anxiety or depression.

Watch this moment
07Supported by research

Vitamin d can reduce skin inflammation.

“it can decrease inflammation on your skin”

Multiple studies indicate that vitamin D plays a role in regulating immune responses in the skin and that its supplementation can help manage or reduce inflammation in various dermatological conditions.

Watch this moment
08Supported by research

Vitamin d acts as an immune modulator, helping to buffer an overactive immune system.

“it's an immune modulator so it helps buffer an over-reactive immune system”

The provided evidence consistently describes vitamin D as an immunomodulator that regulates inflammatory pathways and helps maintain immune system balance.

Watch this moment
09Supported by research

In the absence of vitamin d, bone becomes softer and malformed.

“without vitamin d the bone is softer and it malforms”

Multiple provided papers confirm that vitamin D is essential for bone health and that a severe shortage leads to conditions like rickets in children and osteomalacia in adults, which are characterized by soft and malformed bones.

Watch this moment

Sources

Vitamin D for Healthy Bones

2017 · Research · Hoelscher Day, Sharon, Farrell, Vanessa A.

Increasing Vitamin D Deficiency among Adults

2015 · Research · Dr.Rabindran Chandran, Dr D Sharad Gedam

Valuable verities on vitamin D

2016 · Clinical Trial · Tim Jansen, Johannes J. Rasker

Orthopedic Trauma Patients Most Often Low in Vitamin D

2017 · Review · M.D. Gregory M. Weiss

급성세기관지염과 혈청 비타민 D와의 상관관계

2018 · Research · 정영권

10Supported by research

Teeth are significantly influenced by vitamin d and calcium.

“the teeth are highly influenced by vitamin d as well as calcium”

Multiple studies confirm that vitamin D is essential for calcium homeostasis, bone metabolism, and the mineralization of teeth, with deficiency linked to issues like hypocalcified dentin and delayed eruption.

Watch this moment
11Supported by research

Insufficient vitamin d can impair muscle recovery after exercise and lead to muscle cramps.

“if you don't have enough vitamin d your muscles are not going to recover after exercise there you're going to get muscle cramps”

Multiple studies confirm that vitamin D deficiency is associated with muscle pain, cramps, and weakness, and that supplementation can aid in muscle recovery and injury prevention.

Watch this moment
12Supported by research

Vitamin d is necessary for alleviating muscle aches, cramps, and weakness.

“so to get rid of achy muscles or cramping muscles or weak muscles you need vitamin d”

Clinical literature identifies muscle weakness, pain, and cramps as symptoms of vitamin D deficiency and supports the use of vitamin D repletion to address these issues.

Watch this moment
13Supported by research

There is a strong association between coronary heart disease and low vitamin d levels.

“a huge association between coronary heart disease and low vitamin d”

Multiple studies consistently report an association between low vitamin D levels and an increased risk or severity of coronary heart disease and related cardiovascular conditions.

Watch this moment
14Supported by research

Low vitamin d is highly associated with fatty liver disease and liver inflammation, such as hepatitis.

“there's a high association with low vitamin d when you have a fatty liver and there's definitely a high association if you have a if you have inflammation in your liver as in hepatitis with low vitam…”

Multiple studies and reviews consistently report that low vitamin D levels are frequently observed in patients with various chronic liver diseases, including hepatitis and non-alcoholic steatohepatitis, and are associated with increased disease severity.

Watch this moment

Sources

Influence of vitamin D on liver fibrosis in chronic hepatitis C: A systematic review and meta-analysis of the pooled clinical trials data

2017 · Meta-Analysis · Alia S. Dadabhai, Behnam Saberi

Hepatic Decompensation in Patients with Chronic Liver Disease: Exploring the Role of Vitamin D Deficiency as a Prognostic Marker

2024 · Research · Gauri Nilajkar, Rukma Jagannath Kolwalkar

Interrelationship between Non-Alcoholic Steatohepatitis and Vitamin D: A Mini Review

2024 · Clinical Trial · Anil Kaintura, Mohamed Abdelrahman El Hussein

Beyond bones: Revisiting the role of vitamin D in chronic liver disease

2025 · Clinical Trial · Rodrigo Guerrero-Guerrero, Osvely Méndez-Guerrero

Six-month vitamin D replacement reduces hepatic steatosis in the absence of weight loss

2015 · Meta-Analysis · Ifigeneia Papapostoli, Frank Lammert

15Supported by research

Vitamin d deficiency can lead to osteomalacia (softening and malformation of bones), osteopenia (pre-osteoporosis), and osteoporosis (thinning and loss of bone density).

“if you're deficient in vitamin d you can have osteomalacia which is softening of the bone that's where the bones can start to malform especially early on in life then osteopenia which is kind of like…”

The provided evidence consistently states that vitamin D deficiency leads to abnormalities in bone metabolism, including osteomalacia, osteopenia, and osteoporosis, due to its role in calcium absorption and bone health.

Watch this moment

Sources

Prevalence of Vitamin D Deficiency in Nonspecific Musculoskeletal Pain

2015 · Research · Alireza Jalili, Mehrdad Bahrabadi

CYP24A1 Polymorphism Effect on Chronic Drugs Administration and Development of Osteomalacia: A Review Article

2021 · Review · Alyaa Hussein Hammadi, Shatha Hussein Ali

Vitamin D for Healthy Bones

2017 · Research · Hoelscher Day, Sharon, Farrell, Vanessa A.

Increasing Vitamin D Deficiency among Adults

2015 · Research · Dr.Rabindran Chandran, Dr D Sharad Gedam

Assessment of the prevalence and associated factors of vitamin D deficiency among patients age greater than or equal to 18 years presented with musculoskeletal pain in selected public hospitals under Addis Ababa city administration health Bureau, Addis Ababa, Ethiopia

2025 · Research · Nigussie, Libsework, Umer Ali, Abduletif

What this page is, and is not

We checked the factual claims made in this video against published research. We did not grade the creator, their intent or the rest of their work, and a “Not confirmed” verdict means the evidence does not back a statement, not that anyone lied. Quotes are kept to a sentence so you can find the moment in the original.

Verdicts describe the strength of published research. They are not medical advice.

Reviewed by a human editor on . Evidence check generated . Read how we check claims, including what the verdicts do and do not mean.

Verdicts describe the strength of published research, not medical, legal or financial advice. AI-assisted analysis can contain errors; open the sources before making important decisions. Spotted a problem? Request a correction.