Vitamin B2, also known as riboflavin, is a member of the water-soluble vitamin B group. Here is a description of vitamin B2 and some common uses:

Description: 

•Chemical properties: Vitamin B2 is a yellow crystal with alkaline properties, soluble in water and alcohol.

•Source: Vitamin B2 is found in many foods, such as meat, fish, dairy, grains, vegetables, and yeast.

•Physiological function: Vitamin B2 is involved in a variety of metabolic reactions in the human body, especially energy metabolism and antioxidant processes.

Purpose: 

1. Energy metabolism: Vitamin B2 is an important component of energy metabolism in the body. It is involved in the metabolism of carbohydrates, fats and proteins, converting nutrients from food into energy for the body to use.

2. Antioxidant effect: Vitamin B2 can play an antioxidant role in the body by participating in the synthesis of antioxidant enzymes. It helps to remove free radicals, reduce oxidative stress damage to cells, and maintain the health of cells.

3. Visual protection: Vitamin B2 is essential for eye health. It is a component of the visual pigment retinal reductase that helps maintain the normal function of retinal cells and protect the visual system.

4. Skin and oral health: Vitamin B2 is beneficial to the health of the skin and oral mucosa. It is involved in the synthesis of collagen, which helps to maintain the elasticity and health of the skin and promotes the normal development of oral tissues.

5. Red blood cell production: Vitamin B2 plays an important role in the production and function of red blood cells. It is involved in the metabolism and utilization of iron and maintains the normal synthesis of hemoglobin.