The main functions of betaine in cosmetics are moisturizing, cleansing and reducing irritation.

Moisturizing: Betaine is a good calming and moisturizing agent. It easily interacts with water to produce moisturizing ability. It is not sticky and makes the skin smooth after use. It can also help reduce skin allergies when combined with other ingredients. Betaine can balance cell osmotic pressure when the skin is in a harsh environment, and assist the cells to restore balance and moisture when skin cells are dehydrated.

Cleaning: The important role of betaine on the skin is also reflected in deep cleansing. When added to cleansing skin care products, it can accelerate the emulsification of skin care products and open skin pores, thus deep cleansing the skin. Remove dirt and other substances from the body.

Reduce irritation: Adding betaine to shampoo can help reduce the irritation of surfactants on the scalp, and can also improve itchiness and dry hair after shampooing; if added to fruit acid products , it helps to reduce the irritation of the skin caused by the low pH value of fruit acid, and can also reduce the occurrence of allergies.

Detection method of betaine

Colorimetric method: Under the condition of pH=1.0, betaine hydrochloride can form a red precipitate with Ray's salt. Centrifuge and discard the supernatant. After clearing the solution, the precipitate was dissolved in 70% acetone and turned into a pink solution. The maximum absorption peak of the reaction solution appeared at 525nm. Betaine hydrochloride content in the range of 0.1 to 12.5 mg complies with the Lambert-Beer law.

High performance liquid chromatography: suitable for the determination of betaine content in wolfberry. After the betaine component in the sample was extracted with methanol solution (2.5+7.5), it was purified with a mixed cation exchange solid-phase extraction column, then diluted to volume with acetonitrile solution (7.5+2.5), and finally used with a UV detector equipped High-performance liquid chromatography is used for measurement at a wavelength of 205nm, qualitative determination is based on the retention time of the chromatographic peak, and quantification is based on the external standard method.

Reference for the above content: Baidu Encyclopedia-Betaine