Vitamin D3
Fat-soluble vitamin with broad roles in immune function, bone health, & musculoskeletal performance.
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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) & those receiving daily or weekly dosing rather than bolus doses.
Vitamin D insufficiency is prevalent among athletes, particularly indoor athletes & those in northern latitudes in winter. Insufficiency is associated with reduced muscle strength, power, & endurance; supplementation of 2,000–6,000 IU/day recommended to maintain 25(OH)D >40 ng/mL.
Vitamin D at 700–800 IU/day reduced hip fracture risk by 26% (RR 0.74) & any nonvertebral fracture by 23% (RR 0.77); no significant benefit was observed at 400 IU/day.
Stacks containing Vitamin D3
Public community stacks that include this ingredient.
This stack addresses the key nutritional & hormonal drivers of female fertility. Folate is essential for DNA synthesis & embryo development. Myo-inositol is the most evidence-backed intervention for improving ovarian function, egg quality, & cycle regularity — particularly in PCOS. CoQ10 restores mitochondrial energy in aging oocytes, & Vitex supports luteal phase adequacy through LH modulation.
Your personalized stack
Built from your goals & the supplement evidence library. You can edit doses & timing.
Heavy Sweater Electrolyte Base
Supports fluid balance during long or hot training sessions.
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, & long-term healthspan.
Your personalized stack
Built from your goals & the supplement evidence library. You can edit doses & timing.
Women’s Daily Baseline (No Fish Oil)
Simple daily baseline to cover common gaps & support long-term health markers without fish-derived oils.
Budget Daily Health Stack
High ROI basics for general health & micronutrient support.
Your personalized stack
Based on your goals & preferences, here is a starting stack you can edit.
Budget Daily Health Base
Maximizes health impact per dollar.