Rejuran Healer PN is a skin healing treatment made of biological molecules called polynucleotides (PN). PN molecules are a biopolymer made up of 13 or more nucleotide monomers bonded together. The DNA extract in Rejuran Healer is obtained from salmon, then segmented into PNs. The benefits of Rejuran are: Improved skin elasticity Improved Hydration Reduced fine lines and wrinkles Skin repair – with improved skin barrier function Skin normalization – thickening of skin, regulation of oil production Improved skin tone Improved skin texture.