Also known as: Cholecalciferol, Sunshine Vitamin
Essential fat-soluble vitamin critical for bone health, immune function, and mood regulation. The most common nutrient deficiency worldwide.
Vitamin D3 is produced in the skin upon exposure to UVB sunlight. It plays a crucial role in calcium absorption, bone mineralization, immune modulation, and neuromuscular function.
Essential for intestinal calcium absorption and bone mineralization. Deficiency leads to rickets in children and osteomalacia in adults.
Supplementation reduces risk of respiratory infections by approximately 12% overall, and up to 70% in those with severe deficiency.
Meta-analyses suggest a small but significant effect on depressive symptoms, particularly in those with baseline deficiency.
With a fat-containing meal
Target: 40-60 ng/mL blood levels
With a fat-containing meal
Under medical supervision
General use — most effective form
Vegan option
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Thorne
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natural elements
Biogena
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