Moderate evidence supports Vitamin D3's role in reducing respiratory infections and preventing fractures in the elderly. However, more research is needed on its impact on athletic performance, particularly in specific populations.
Prevention of acute respiratory tract infectionsChildren and adults (ages 0–95); 25 RCTs, n=11,321 · Systematic review and meta-analysis of individual participant data from RCTsModerate
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 status & physical performance in athletesCompetitive and recreational athletes · Narrative reviewLow
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.
Fracture prevention in elderly adultsAmbulatory and institutionalized elderly persons · Systematic review and meta-analysis of RCTsModerate
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.
Heavy Sweater Electrolyte Base
Supports fluid balance during long or hot training sessions.
Budget Daily Health Base
Maximizes health impact per dollar.
Women’s Daily Baseline (No Fish Oil)
Simple daily baseline to cover common gaps & support long-term health markers without fish-derived oils.
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.
Longevity & Metabolic Health Base
Foundational stack aimed at mitochondrial function, insulin sensitivity, & long-term healthspan.
Vegetarian Omega Longevity Base
Plant-based omega-3 support for long-term cardiometabolic health.
Your personalized stack
Based on your goals & preferences, here is a starting stack you can edit.
Your personalized stack
Built from your goals & the supplement evidence library. You can edit doses & timing.
Your personalized stack
Built from your goals & the supplement evidence library. You can edit doses & timing.
Men's Fertility, Power & Recovery Stack
This personalized supplement stack is optimized for enhancing your baseline health, supporting recovery, and boosting strength during your active training phase. With Vitamin D3 for immune support, electrolytes for hydration, fish oil for overall wellness, creatine for power, and tart cherry for recovery, this budget-friendly combination will help you maintain peak performance and promote effective recovery.
Budget Daily Health Stack
High ROI basics for general health & micronutrient support.
Forms & usage▾
Take 700–800 IU daily, preferably with a meal.