Vitamin D3

Description
It is a white or almost white crystal. It is practically insoluble in water, freely soluble in ethanol (96 per cent), soluble in trimethylpentane and in fatty oils. It is sensitive to air, heat and light. Solutions in solvents without an antioxidant are unstable and are to be used immediately.

### Application

Vitamin D3 (cholecalciferol) is an essential fat‑soluble vitamin, alongside D2. It mainly regulates calcium and phosphorus metabolism.

Human skin produces Vitamin D3 when cholesterol reacts with sunlight; proper sun exposure supports sufficient synthesis.

Deficiency weakens calcium‑phosphorus absorption and bone calcification, leading to rickets in children and osteomalacia in adults.

Main functions:

1. Boost calcium & phosphorus absorption
2. Support growth, bone calcification and dental health
3. Increase intestinal and renal phosphorus reabsorption
4. Sustain normal blood citrate levels
5. Avoid renal amino‑acid loss