Oligopeptide-68 is a chemical compound, a class of biomolecules in abbreviated form, a synthetic protein composed of amino acids linked together:arginine, 

aspartic acid, glycine, glutamine, isoleucine, leucine, serine, threonine, tryptophan and tyrosine

Synthetic peptides can be generated as copies of protein fragments by incorporating non-proteinogenic amino acids and modifications to enhance the proteolytic stability of the molecules. Peptides are used in the development of therapeutic drugs for their antimicrobial activity, and for their bioactive interest.

Peptides, natural and synthetic, have the ability to activate an immunomodulatory action by interacting with the cells of the immune system. (Werner GH. Natural and synthetic peptides (other than neuropeptides) endowed with immunomodulating activities. Immunol Lett. 1987 Dec;16(3-4):363-70. doi: 10.1016/0165-2478(87)90170-2. )

What it is used for and where

Cosmetics - INCI Functions

Bleaching agent. This ingredient exerts a depigmentation and/or lightening action on the set of pigments produced by melanocytes and known as melanin, the substance responsible for skin colouration.