Vitamin B2, also called riboflavin. The molecular formula is C 17H20N4O6. It is one of the essential 13 vitamins for human body. As a member of vitamin B group, it is slightly soluble in water, soluble in sodium chloride solution and easily soluble in dilute sodium hydroxide solution. General function 1, promoting development and cell regeneration; 2. Promote the normal growth of skin, nails and hair; 3. Helps to eliminate inflammation of the mouth, lips and tongue; 4. Improve eyesight and reduce eye fatigue; 5. Interact with other substances to help the metabolism of carbohydrate, fat and protein. Mechanism of Action Vitamin B2 binds to specific protein to produce xanthase. Xanase plays the role of transferring hydrogen in substance metabolism and participates in the respiratory process of tissues. The normal requirement is 1, the recommended daily intake for adults is 1.7mg, and it is needed during pregnancy 1.6mg, and 1.8mg in the first six months. During the next 6 months of lactation. 2. People who are often in a state of tension should increase their intake; 3. Women who take birth control pills and are pregnant or breastfeeding need more vitamin B2; 4. People who don't eat lean meat and dairy products often should increase their intake of vitamin B2; 5. People who have long-term diet control due to ulcer or diabetes are more prone to vitamin B2 deficiency; If a person with a special disease is being treated, if he wants to change the diet specified by the doctor, he must consult with the doctor. 6. For all nervous people, it is necessary to increase the dosage of vitamin B2 complex; 7, with vitamins B6, C and nicotinic acid, the best effect. Adults can meet the needs by eating/kloc-0 animal liver every day; Adults can meet their needs by eating about 2 kg of soybeans every day; Adults can meet their needs by eating three lettuce a day; Adults eat three a day? Four mushrooms can meet the demand. Vitamin B2 deficiency can lead to inflammation and dysfunction of the mouth, lips, skin and genitals, which is called riboflavin deficiency. Vitamin B2 deficiency leads to seborrheic dermatitis (seborrheic skin around eyes, nose and skin has dandruff and scab); Vitamin B2 deficiency can cause lip redness, stomatitis, cheilitis, angular stomatitis and glossitis; Vitamin B2 deficiency will make eyes bloodshot, easy to shed tears, easy to feel tired and dizzy; Vitamin B2 deficiency can also cause vaginal itching. Excessive intake may cause itching, paralysis, burning and tingling. If you are taking anticancer drugs, such as methotrexate, excessive B2 will reduce the efficacy of these anticancer drugs. Food-derived milk and its products, animal liver and kidney, egg yolk, eel, carrot, brewing yeast, mushrooms, laver, fish, celery, oranges, oranges and other people who need more vitamin B2, as well as pregnant women and lactating women who take birth control pills need more vitamin B2. 2. People who don't eat lean meat and dairy products often should increase vitamin B2; People who have been in a state of mental stress for a long time need to be supplemented. A small amount of replenishment cycle stays in the human body, so it needs to be replenished every day. Riboflavin with special effects is also related to the quality of people's sexual life. When the human body lacks riboflavin, especially when it is seriously deficient, the mucosal layer of human body cavity will have problems, causing mucosal lesions, leading to decreased sexual desire and frigidity. The new health function of riboflavin is 1, diuresis and detumescence; 2. Prevention and treatment of tumors; 3. Reduce the occurrence of cardiovascular and cerebrovascular diseases. Remarks: Vitamin B2 has the best synergistic effect with vitamin B6 and vitamin C.. When eating high-calorie food, you must take more vitamin B2, which is the natural enemy of vitamin B2. Vitamin B2, also known as riboflavin, should be avoided as much as possible. It is slightly soluble in water and stable when heated in neutral or acidic solution. It is a component of flavases in the body (flavases play a role in hydrogen transfer in biological oxidation and reduction), which will affect the biological oxidation of the body and cause metabolic disorder when lacking. Its pathological changes are mostly manifested as inflammation of mouth, eyes and external genitalia, such as angular stomatitis, cheilitis, glossitis, conjunctivitis and bursitis, so this product can be used for the prevention and treatment of the above diseases. The storage of vitamin B2 in the body is very limited, so it should be provided through diet every day. Two properties of vitamin B2 are the main reasons for its loss: (1), which can be destroyed by light; (2) Heating in alkaline solution will be destroyed. I. Physiological function of vitamin B2 1. Participating in the metabolism of carbohydrate, protein, nucleic acid and fat can improve the utilization rate of protein and promote its growth and development. 2. Participating in the growth and metabolism of cells is an essential nutrient for the metabolism and repair of tissues. 3. Strengthen liver function and regulate adrenaline secretion. 4. Protect the function of skin, hair follicle mucosa and sebaceous glands. Second, absorption and metabolism of vitamin B2 Most of the vitamin B2 in the diet exists in the form of flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) coenzyme combined with protein. After entering the stomach, it is separated from protein under the action of gastric acid, converted into free vitamin B2 in the upper digestive tract, and absorbed in the upper part of the small intestine. When the intake is large, the liver and kidney often have high concentrations, but the body's ability to store vitamin B2 is limited. When it exceeds the renal threshold, it passes through the urinary system and is excreted in a free form. Therefore, the daily needs of body tissues must be supplied by diet. Third, the symptoms and toxicity caused by vitamin B2 deficiency are different from all other vitamins. A slight deficiency of vitamin B2 will not cause any serious diseases. However, severe vitamin B2 deficiency can cause some diseases, such as angular stomatitis, glossitis, seborrheic dermatitis of nose and face. Red eyes and cornea, congestion and so on. As far as we know, vitamin B2 is nontoxic.