the highest concerntration of peptides in a serum
1 Argireline is completely non-toxic, safe and has no side effects. 2  Faitoz-25 Argireline serum contains the highest concentration of Argireline available today. 3  15% Matrixyl 3000 Peptide â It is made up of two premium peptides, Palmitoyl Oligopeptide and Palmitoyl Tetrapeptide â 7.his 4oz. size of Faitoz-25 offers you great value since each once of product only costs you less than $26 when you apply the sale coupon code at checkout. Faitoz-25 Extreme Peptide Serum Active Ingredients: