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Vitamins & Minerals
Vitamin D3
Also known as: Cholecalciferol · Vitamin D · D3
Strong Evidence612+ human studies
Deficiency is endemic (>40% of Western adults) and associated with higher all-cause mortality. Supplementation corrects deficiency effectively.
Mechanism of Action
Nuclear receptor activation regulates 200+ genes. Regulates calcium metabolism, immune function, and cellular differentiation.
Dosage & Timing
Dose
2,000–5,000 IU/day (test first)
When to take
With a fatty meal
Stacks Well With
Evidence Scores
Evidence Quality
A0/100
Safety Profile
A+0/100
Popularity
A+0/100