[noun] Peptides are protein fragments or amino-acid chains, small molecules naturally present in the body, in various forms, that play a key role in sending signals that stimulate metabolic reactions.
Peptides in skincare are used primarily to revive the skin’s natural mechanisms, which weaken over time, thereby helping to slow skin ageing.
Peptides are easy to reproduce synthetically, but peptide technology, when used to reproduce the exact sequences desired, is very expensive. Being so small, peptides are highly prized because they allow very effective skin penetration. They also have the rare characteristic of being active at low concentrations, hence their reputation as “super-effective” molecules.