Brand from Japan: REIKO KAZKI. The secret to youth is the elasticity of bare skin and luster of hair!REIKO KAZKI was conceived with the idea of creating a product that is good for the skin but also makes people look young and energetic.Amino acid production declines with age.If we lack the amino acids to produce keratin, healthy hair cannot grow.That is why Reiko Kazuki focused on the amino acids that make up hair.We have developed a hair care series that addresses your concerns by employing an amino acid surfactant that gently cleanses the hair.Regulates scalp environment. Regulates hair. Gives luster.With a formulation that adheres more closely to the hair, we have created a treatment that compensates for daily damage, dry damage caused by aging, and other factors.Contains PRODEW(R)500, an amino acid beauty ingredient developed exclusively for hair.Supplementing hair with amino acids is said to be effective in moisturizing hair, improving strength, and preventing hair color from fading.Contains