Vitamin D3
Fat-soluble vitamin with broad roles in immune function, bone health, and musculoskeletal performance.
Stacks containing Vitamin D3
Public community stacks that include this ingredient.
Vegetarian Omega Longevity Base
Plant-based omega-3 support for long-term cardiometabolic health.
Longevity & Metabolic Health Base
Foundational stack aimed at mitochondrial function, insulin sensitivity, and long-term healthspan.
Your personalized stack
Built from your goals and the supplement evidence library. You can edit doses and timing.
Women’s Daily Baseline (No Fish Oil)
Simple daily baseline to cover common gaps and support long-term health markers without fish-derived oils.
Budget Daily Health Stack
High ROI basics for general health and micronutrient support.
Your personalized stack
Based on your goals and preferences, here is a starting stack you can edit.
Budget Daily Health Base
Maximizes health impact per dollar.
Vitamin D supplementation reduced risk of acute respiratory tract infection (adjusted OR 0.88, 95% CI 0.81–0.96); greatest benefit in those with baseline deficiency (<25 nmol/L) and those receiving daily or weekly dosing rather than bolus doses.
Vitamin D at 700–800 IU/day reduced hip fracture risk by 26% (RR 0.74) and any nonvertebral fracture by 23% (RR 0.77); no significant benefit was observed at 400 IU/day.
Vitamin D insufficiency is prevalent among athletes, particularly indoor athletes and those in northern latitudes in winter. Insufficiency is associated with reduced muscle strength, power, and endurance; supplementation of 2,000–6,000 IU/day recommended to maintain 25(OH)D >40 ng/mL.