Vitamin D supports immunity, bone health, and muscle function. Most people are deficient.
Benefits
Supports immunity, bone density, muscle strength. Critical for indoor athletes.
Dosage
2000-5000 IU daily. Get tested to determine optimal dose.
Sources
Sunlight (best), fatty fish, fortified foods. Supplement in winter or if indoor.
Conclusion
Test vitamin D levels annually. Supplement 2000-5000 IU daily if deficient.
