There are more than twelve types of B vitamins, and nine of them are universally recognized as essential vitamins for the human body. All of them are water-soluble vitamins that only stay in the body for a few hours and must be supplemented daily. B group is an essential nutrient for all human tissues and is the key to releasing energy from food. They are all coenzymes involved in the metabolism of sugars, proteins, and fats in the body, and are therefore classified as a family.

All vitamin B must act simultaneously, known as the fusion effect of vitamin B. Consuming a certain VB alone increases the demand for other VBs due to increased cellular activity, so the functions of various VBs complement each other, known as the "barrel principle". Roger Dr. William pointed out that all cells have exactly the same demand for VB.

The B vitamins closely related to skincare include B1, B2, B3, B5, B6, and H. Vitamin B1, also known as thiamine, can inhibit cholinesterase activity, reduce skin inflammation, and has the effect of preventing and treating seborrheic dermatitis, eczema, and promoting skin health. Mainly sourced from grains, fresh vegetables, fruits, milk, egg yolks, lean meat, liver, yeast, bran, peanuts, etc. Vitamin B2, also known as riboflavin, participates in cellular redox reactions, hemoglobin synthesis, and metabolism of sugars, proteins, and fats. It can help the skin resist damage from sunlight and promote cell regeneration. When there is a lack of vitamin B2 in the body, the skin is more sensitive to sunlight and prone to solar dermatitis. After being exposed to sunlight for a long time, the face becomes red and itchy, and powdery substances appear around the nose. Mainly sourced from egg yolks, milk, yeast, green leafy vegetables, rice bran, germ, animal liver and kidneys, carrots, brewing yeast, fish, oranges, tangerines, oranges, etc. Vitamin B3, also known as niacin, can inhibit the formation of melanin in the skin and prevent skin roughness. Beneficial for the recovery of damaged cells or skin. It plays an important role in maintaining the integrity of normal tissues, especially the skin, digestive tract, and nervous system. Vitamin B6 is closely related to skin health and is a part of the molecular structure of many enzymes and auxiliary enzymes. Promoting the metabolism of amino acids to maintain skin health can reduce capillary wall permeability and hyaluronidase activity, decrease allergic and inflammatory reactions, and promote epithelial cell growth. It can be used to prevent and treat rough skin, acne, sunburn, itching, and sun tanning. It can also be used to prevent and treat seborrheic skin inflammation, general acne, dry seborrheic dermatitis, eczema, and flaky skin changes. Mainly sourced from liver, egg yolk, grains, germ, beans, milk, fish, meat, and vegetables. Vitamin H, also known as biotin, can promote skin metabolism, improve skin roughness, prevent hair loss, seborrheic dermatitis, and polymorphic acne. Exists in foods such as liver, egg yolk, milk, yeast, etc.

The most common members of the vitamin B family are B1.B2.B3 (niacin), B5 (pantothenic acid), B6.B9 (folate), and B12 (cobalamin).

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