Dr John Campbell
Dr John Campbell
@campbellteaching·3.3M subscribers·3.1K videos

Vitamin D update

Posted

March 2, 2025

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With Professor David Anderson. Link to order or download, Vitamin D and the Great Biology Reset,

Professor David Anderson (retired endocrinologist) emphasizes the importance of vitamin D3, especially for those in northern locations where sunlight exposure is limited in winter.

Vitamin D is primarily produced when skin is exposed to sunlight (UVB rays); Professor Anderson argues most people are deficient and should supplement year-round.

According to Anderson, a blood level above 50 ng/ml (125 nmol/L in UK units) is necessary for proper immune function and to protect against various diseases.

Professor Anderson claims that vaccinations deplete vitamin D levels, particularly the "reservoir form" (calcifediol), and he and his wife take supplements to counteract this effect.

The professor takes 100,000 units of vitamin D3 monthly (via oil-based solution) and personally takes either daily supplements (5,000-10,000 units) or calcifediol weekly, Overweight individuals may need higher doses and should titrate with blood levels under their doctors.

Anderson and co-author David Grimes have published books on vitamin D deficiency and COVID-19, available as free PDF downloads from their website.

He claims vitamin D is protective against some cancers, assists brain repair after strokes, and is linked to preventing numerous other health conditions.

Anderson expresses concerns about pharmaceutical companies being opposed to vitamin D supplementation, alleging they profit from keeping people vitamin D deficient.

Dr Grime’s book to introduce the importance of vitamin D

Welcome to Professor David Coussmaker Anderson, who has had a lifetime in medicine, consultant physician, professor of endocrinology, medical researcher, medical author, medical teacher and lecturer. Member of the royal society of medicine, member of the American endocrine society … we could go on.

Guests & Subjects Covered

Vitamin DProfessor AndersonDavid GrimesDr GrimesD WelcomeProfessor David Coussmaker Anderson

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Vitamin D update · Dr John Campbell · Sentinel