Sub-Cu Glycine has four active ingredients that help make your neck look younger, firmer, and toner. This product uses Glycine, Carnosine, Arginine, and N-Acetyl L-Carnitine HCL. These active ingredients help improve skin elasticity and firmness around the neck, chin, and jaw line areas. The product carries no phthalates, silicones, parabens, sulfates, dyes, or fragrances.