Tetrapeptide-30. It is an active anti-aging, anti-inflammatory and whitening in nature. It is Amino acid sequence Proline – Lysine – Glutamic Acid – Lysine; PKEK . It contributes to an even skin tone, achieved via an anti-inflammatory activity of the peptide that finally leads to a reduction of the amount of tyrosine and an inhibition of melanocyte activation. It leads to a visible fading of the hyper-chromatic spots which make it an interesting choice for anti-aging. It is active on all kinds of skin types, reduces acne lesions and alleviates melasma on ethnic skin. It is applicable in skin lightening preparations, anti-aging preparations, ethnic skin care, hand creams and decorative preparations.