Vitamin AD3 is A fat-soluble vitamin composed of vitamin A, vitamin D3, and vitamin E. Here is a description of vitamin AD3 and some common uses:

Description: 

·Vitamin A: Vitamin A is an important fat-soluble vitamin found in animal foods (such as liver, cream, cod liver oil, etc.) and some plant foods (such as carrots, spinach, kale, etc.). It is essential for maintaining normal vision, cell differentiation, immune function and reproductive health.

·Vitamin D3: Vitamin D3, also known as cholecalciferol, is a form of vitamin D. It can be taken through skin exposure to sunlight or from certain foods (such as cod liver oil, egg yolks, dairy products, etc.). Vitamin D3 is converted into active form in the body to promote the absorption and utilization of calcium and phosphorus, maintaining bone health.

·Vitamin E: Vitamin E is a fat-soluble antioxidant found in some vegetable oils and nuts. It helps protect cells from free radical damage, maintains the integrity of cell membranes, promotes immune function and anti-inflammatory effects.

Purpose: 

1. Bone health: Vitamin AD3 plays a key role in promoting the absorption and utilization of calcium and phosphorus, which helps maintain bone health and strength.

2. Vision protection: Vitamin A is an important component of the retina and is essential for maintaining normal vision. Vitamin A intake can help prevent night blindness and other vision-related problems.

3. Immune support: Both vitamin A and vitamin D3 play an important role in the function of the immune system. They help boost the activity of immune cells and improve the body's ability to fight pathogens.

4. Cell protection: Vitamin E acts as an antioxidant and helps protect cells from free radical damage. It can reduce the effects of oxidative stress on cells and maintain cell health.

5. Reproductive health: Vitamin A is important for the reproductive health of both men and women. It is essential for the formation of sperm and the maintenance of ovarian function.