12d • DISCUSSION
Why you don't need vitamin D
99% of doctors, gurus, trainers, health nuts ect... always push taking high doses of Vitamin D. What they don't understand is Vitamin D is something you should avoid taking.
Vitamin D shuts off your immune system. Whoops. That's not a good idea.
Why low vitamin D on a lab doesn’t always equal deficiency - you don't need Vit D as you might assume.
A low 25-hydroxy vitamin D result often reflects inflammation, not lack of intake.
- Storage D: 25-hydroxy vitamin D (what most doctors order)
- Active D: 1,25-dihydroxy vitamin D (rarely tested)
A high active D with low storage D often signals infection or immune activation, not deficiency.
High-dose vitamin D can create new problems. When taken without cofactors, vitamin D can:
- Deplete magnesium (required at multiple steps of vitamin D metabolism)
- Suppress vitamin A (retinol) uptake
- Disrupt potassium and sodium balance
- Worsen fatigue, anxiety, sleep issues, and hormone symptoms in some people
Vitamin D is essential but high-dose supplementation without minerals, vitamin A, and context can backfire.
Low vitamin D is often a marker of inflammation, not a mandate to supplement more.
Low vitamin D is correlated with high inflammation, which is actually driven by iron accumulation. Taking vitamin D3 supplements can exacerbate this problem
Humans have more than a dozen different forms (metabolites) of 25D and the typical vitamin D test works on two of them.
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Why you don't need vitamin D
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