Vitamin D3

Promotes calcium uptake, supports bone density, strengthens immune function, may improve mood.

Doses above 4000 IU/day long-term can cause toxicity (hypercalcemia). Consult a doctor for high-dose therapy.

Vitamin D3 (cholecalciferol) is the form your body makes from sunlight. Supplementation is common in people with limited sun exposure, darker skin, or those who work indoors.