How Much Vitamin D Do You Actually Need? A Research-Based Guide
Everything you need to know about vitamin D dosing, deficiency, testing, and supplementation — based on current research, not marketing.
Vitamin D
Best Vitamin D Supplements (2026): Science-Backed Picks
·7 mins
The best vitamin D supplements for 2026, including standalone D3 and D3+K2 combos, tested for quality and value.
Vitamin D and Cancer Risk: What Large Studies Show (2026)
This article reviews the current evidence on the relationship between vitamin D and cancer risk, highlighting key findings from large studies and meta-analyses.