Oryza sativa is the plant species most commonly referred to in English as rice. Oil can be extracted from the bran (the hard outer layer of the grain) resulting in rice extract. Hydrolyzed rice extract is produced after rice extract undergoes hydrolysis. Hydrolysis is a decomposition reaction involving water that breaks large molecules down into smaller molecules. Ingredients that undergo hydrolysis are better absorbed by the skin and hair.
Hydrolyzed rice extract is beneficial to the skin because it stimulates the synthesis of filaggrin, a protein that is responsible for maintaining the structural integrity of the stratum corneum (the skin’s outermost layer). Filaggrin is necessary for proper skin barrier functioning. Thus, hydrolyzed rice extract helps to maintain a strong, intact skin barrier. Hydrolyzed rice extract has also been shown to improve microcirculation when applied to dark circles underneath the eyes. By improving circulation, hydrolyzed rice extract prevents blood from stagnating in small blood vessels and increases oxygen supply to the delicate tissues around the eyes. Lastly, hydrolyzed rice extract has anti-inflammatory properties that make this ingredient useful for conditions such as acne and eczema.