Reverse the signs of aging with this unique and effective formula. HGF Youth Serum contains the scientifically-proven active Acetyl Tetrapeptide-2, a peptide derived from the youth hormone. This highly purified ingredient compensates for the natural loss of our thymic factors related to the decline of the thymus with age. By reinforcing the skin’s immune defenses and boosting the epidermal regeneration, Acetyl Tetrapeptide-2 is “The” approach to combat aging. It is also nutrient-rich in Seaweed Extract and Hyaluronic Acid. Hydrates skin, Regenerates epidermal tissue, Boosts skin’s immune system.