An amino acid, L-Arginine typically functions as a pH adjuster. Since L-Arginine is a base (alkaline pH, the pH of a 10% solution is between 10.5-12), it is used to increase the pH of the cosmetic ingredients. It is much more milder and easier to work with NaOH (sodium hydroxide, caustic soda) or baking soda (sodium bicarbonate or sodium bicarb) and we recommend its application over the others.
L-Arginine is a natural essential or semi-essential amino acid necessary for synthesis of proteins. It is used as a dietary supplement as well as in pharmaceuticals and cosmetics. Its health benefits are relatively irrelevant in hair and skin care because the concentrations we use are relatively low.
L-Arginine is a white crystalline ingredient, easily soluble in water and insoluble in ethanol.