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THE IMPORTANCE OF VITAMIN D

AND

WHY I BELIEVE THAT YOU SHOULD TAKE IT EVERY DAY

 Disclaimer: I am not a qualified health practitioner.  You should always consult a qualified health practitioner if you are sick. Opinions expressed on this website are my own or come from my own experience or research

The question is, should you be taking Vitamin D every day and if so, how much?  

If you live in the northern hemisphere, I believe that the short answer is 'Yes'.

Even if you live in the southern hemisphere, if you are spending most of your day at a desk, then I believe that the short answer is also 'Yes'. 

According to the University of Miami, nearly 2/3 or Americans are deficient in Vitamin D.

In the UK, more than 50% of adults have Vitamin D deficiency and 16% have deficiency during winter and summer. 

80-90% of Vitamin D is derived from sunlight and only 10-20% is derived from dietary sources. 

Ideally, get a blood test so you know where your level is and supplement accordingly. 

Why is Vitamin D so important?  And why should we be supplementing daily? 

 

Vitamin D levels are associated with the following conditions.

Covid

Influenza

Bronchitis

Pneumonia

 

Prostate cancer

Colon cancer

Ovarian cancer

Breast cancer,

Cancer treatments

Dementia

Diabetes  type II

Obesity

Polycystic ovary syndrome

All infections

 

TB

Low mood

Alzheimer’s

Parkinsons

MSK pains and problems

Osteoporosis

MS

RA

Systemic Lupus  Erithromotosis

Diabetes Mellitus Type 1

Crohns, Psorias,

Eczema

Hypertension

Coronary Artery Disease

Heart failure

Stroke

Pre-eclampsia

You may think that the above list is a bold claim but please see the references at the bottom of this page listing a selection of scientific research papers (there are simply too many to list them all here)  demonstrating the link between Vitamin D and these conditions. 

 

First, I would like to talk about Vitamin D and Immunity. Our Vitamin D status is absolutely key to our ability to fight off infection. Understanding how Vitamin D is processed in the body explains why we may need to take it every day. 

Vitamin D and Immunity 

So if I get sick, I'll just take a large dose of Vitamin D, right?

Wrong!

It doesn't Work Like That!

References:

https://news.miami.edu/stories/2025/10/why-are-so-many-americans-deficient-in-vitamin-d.html

https://www.swbh.nhs.uk/wp-content/uploads/2012/07/Vitamin-D-deficiency-ML4396.pdf

https://www.aan.com/PressRoom/Home/PressRelease/1300

https://www.mdpi.com/1422-0067/26/5/2153

https://pmc.ncbi.nlm.nih.gov/articles/PMC10328709/

https://www.sciencedirect.com/science/article/pii/S2161831325000304

https://nutrition.bmj.com/content/early/2025/06/05/bmjnph-2025-001213

https://www.health.harvard.edu/staying-healthy/vitamin-d-supplements-linked-to-lower-risk-of-advanced-cancer#:~:text=No%20overall%20cancer%20reduction,as%20the%20normal%2Dweight%20participants?

https://www.nejm.org/doi/full/10.1056/NEJMoa1809944#:~:text=Conclusions,1%2C4%E2%80%936

https://pmc.ncbi.nlm.nih.gov/articles/PMC3349248/#:~:text=4.,is%20expressed%20in%20the%20CNS.

https://pmc.ncbi.nlm.nih.gov/articles/PMC9807223/

https://pmc.ncbi.nlm.nih.gov/articles/PMC3188408/#:~:text=reach%20a%20nadir.-,TREATMENT,every%202%20to%204%20weeks.&text=Patients%20with%20fat%20malabsorption%20or,and%20associated%20signs%20and%20symptoms.

https://pmc.ncbi.nlm.nih.gov/articles/PMC9578072/

https://pmc.ncbi.nlm.nih.gov/articles/PMC9578072/

https://mstrust.org.uk/a-z/vitamin-d?utm_medium=ppc&utm_source=adwords&utm_campaign=SS+%7C+Search+%7C+Information&utm_term=vitamin%20d%20and%20ms&hsa_acc=6635963470&hsa_src=g&hsa_grp=168892400127&hsa_kw=vitamin%20d%20and%20ms&hsa_ver=3&hsa_tgt=kwd-127615655&hsa_mt=b&hsa_ad=706904366582&hsa_net=adwords&hsa_cam=45961817&gad_source=1&gad_campaignid=13649658388&gbraid=0AAAAAD1EJK1WGlV_drn3CAWVU38MXfxnW&gclid=CjwKCAiAtq_NBhA_EiwA78nNWCnl3WUZVeN9VCxp7sn-1hmnnOOLgYCZsTNjxfWfkuU2_WltEH9eixoCGdgQAvD_BwE

https://ard.bmj.com/content/82/Suppl_1/1442

https://www.nature.com/articles/nrrheum.2015.140

https://pmc.ncbi.nlm.nih.gov/articles/PMC5743852/#:~:text=Vitamin%20D%20supplementation%20may%20be%20beneficial%20for,vitamin%20in%20patients%20with%20SLE%20is%20recommended.

https://pmc.ncbi.nlm.nih.gov/articles/PMC8641172/

https://www.crohnsandcolitis.org.uk/news-stories/news-items/study-into-vitamin-d#:~:text=This%20confirms%20that%20patients%20with,is%20found%20to%20be%20low.

https://pmc.ncbi.nlm.nih.gov/articles/PMC6566188/#:~:text=Abstract,%2Dinflammatory%2C%20tolerogenic%20immune%20responses.

https://academic.oup.com/skinhd/article/5/3/178/8117745

https://www.medicalnewstoday.com/articles/314549

https://nationaleczema.org/blog/get-the-facts-vitamin-d/

https://onlinelibrary.wiley.com/doi/full/10.1002/cdt3.83

https://newsroom.heart.org/news/heart-attack-risk-halved-in-adults-with-heart-disease-taking-tailored-vitamin-d-doses#:~:text=Research%20Highlights:,40%2D80%20ng/mL.

https://newsroom.heart.org/news/heart-attack-risk-halved-in-adults-with-heart-disease-taking-tailored-vitamin-d-doses#:~:text=Research%20Highlights:,40%2D80%20ng/mL.

https://healthcare-bulletin.co.uk/article/a-study-of-association-of-serum-vitamin-d-levels-with-acute-ischemic-stroke-3023/

https://pmc.ncbi.nlm.nih.gov/articles/PMC9268813/#:~:text=Vitamin%20D%20deficiency%20may%20be%20associated%20with:,*%20Lack%20of%20controlled%20and%20randomized%20studies

https://www.preeclampsia.org/the-news/research/can-vitamin-d-during-pregnancy-lower-the-risk-of-preeclampsia-and-preterm-labor#:~:text=The%20results%20showed%20that%20taking,;24(1):852.

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0281234#:~:text=A%20better%20understanding%20of%20the,sunscreen%20%5B2%2C%204%5D.

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