Nicotinoyl Sh-Pentapeptide-19

Nicotinoyl Sh-Pentapeptide-19 is a synthetic peptide derived from niacinamide (vitamin B3), designed to address uneven skin pigmentation. It belongs to a class of modified niacinamide compounds that have been studied for their effects on melanin production and distribution in the skin.Rather than directly inhibiting the enzyme responsible for melanin synthesis, this ingredient appears to work by interfering with how melanin is transferred between skin cells, potentially leading to a more even complexion and reduced appearance of dark spots.

Melanin production and distribution involves several steps. Melanosomes (packages of pigment) are created in melanocytes and then transferred to keratinocytes (the outer skin cells) to give skin its colour. This ingredient appears to interrupt that transfer process, reducing the amount of pigment that reaches the skin surface without affecting whether the pigment is made in the first place.By working on melanosome transfer rather than tyrosinase (the enzyme that creates melanin), it may offer a different mechanism to other pigmentation-targeting ingredients, though research on this specific…

This ingredient is typically found in serums or targeted treatments for hyperpigmentation. Use as directed on the product label. Since it targets pigment at the cellular level, results may take several weeks of consistent use to become visible. It can generally be incorporated into both morning and evening routines, though always check individual product instructions.

This ingredient has shown a favourable safety profile in the limited testing available, with no reported irritation or sensitisation at typical use concentrations. As with any active ingredient, a patch test is prudent if you have very sensitive skin.