Medically reviewed by Melissa Nieves, LND Key Takeaways Vitamin D3 maintains higher and more stable blood levels than vitamin ...

Vitamin D, in D2 (plants) and D3 (sunlight, foods), supports overall health, including bone health, immune function, calcium absorption, and muscle strength. D2 fortifies foods, while D3 is found in ...

Vitamin D is far more than just a "sunshine vitamin"; it's a critical pro-hormone essential for numerous functions that support health, fitness, and vitality. Its most well-known function is ...