Peptides aren’t one thing. They are at least eight different mechanisms — signaling, carrying, inhibiting, brightening. Sequence12’s rules engine picks across categories the way a formulator would: by your skin’s actual job list.
Messengers that tell fibroblasts to make more collagen, elastin, glycosaminoglycans and fibronectin. The workhorse class of anti-aging actives.
Bind cell-surface receptors and activate downstream signal cascades (TGF-β, MAPK) that upregulate extracellular-matrix synthesis.
Chelate trace metals like copper and iron and deliver them into the dermis where wound-healing pathways need them.
A peptide ligand binds Cu²⁺ (or Mn²⁺) and shepherds it through the stratum corneum to fibroblasts and keratinocytes.
Soften expression lines by gently dampening the muscle-contraction signal at the surface — a topical, reversible cousin of injectable neuromodulators.
Mimic the N-terminus of SNAP-25 or antagonize nicotinic acetylcholine receptors, attenuating SNARE-complex assembly.
Slow the enzymes that break collagen, elastin, and pigment regulation. Protective rather than productive.
Competitive or allosteric inhibitors of MMPs (matrix metalloproteinases), elastase, or tyrosinase.
Address hyperpigmentation by interrupting melanin synthesis upstream — without the barrier disruption of acids.
Inhibit tyrosinase, the rate-limiting enzyme converting tyrosine to L-DOPA en route to melanin.
Calm reactive skin and structure the way new collagen organizes after a procedure or insult.
Modulate inflammatory cytokines and regulate collagen-fibril diameter in the papillary dermis.
Native components of the skin's immune system. Strengthen the acid mantle without sterilizing it.
Activate leucine-rich repeat receptors on dormant stem cells; disrupt microbial membranes selectively.
Increase the skin's ability to hold and move water. Different mechanism from humectants — these change the channels, not the load.
Upregulate aquaporin-3 expression, increasing transmembrane water transport in epidermal keratinocytes.