Dipeptide
A dipeptide is two amino acids joined by a peptide bond—the shortest chain still called a peptide.
What is Dipeptide?
A dipeptide is two amino acids joined by a peptide bond—the shortest chain still called a peptide. Carnosine (beta-alanyl-L-histidine) is the best-known dipeptide supplement. In cosmetics, dipeptide INCI names often end in “Dipeptide-#” and may target expression lines, dark circles, or barrier support depending on sequence.
Where you will see Dipeptide
On product labels, look for the INCI name in the full ingredient list—not just front-of-pack nicknames. Concentration, formula pH, and what else is in the bottle all change how a peptide behaves on skin or hair.
Dipeptide vs tripeptide on labels
A dipeptide has two amino acids; a tripeptide has three. The number in an INCI name (for example Dipeptide-2) is a registry ID, not a count of every dipeptide in the formula—always read the full ingredient list.
Common questions
What does Dipeptide mean?
A dipeptide is two amino acids joined by a peptide bond—the shortest chain still called a peptide. Carnosine (beta-alanyl-L-histidine) is the best-known dipeptide supplement. In cosmetics, dipeptide INCI names often end in “Dipeptide-#” and may target expression lines, dark circles, or barrier support depending on sequence.
Is Dipeptide an INCI ingredient name?
Sometimes. Brands use nicknames on the front label and INCI names on the back. Search our directory with either form to find the matching peptide page.