Biocita hyaluronic day 400 mg is a dietary supplement based on 400 mg of hyaluronic acid and gaba. In tempo the skin is subjected to external aggressions and the regeneration process decreases, which leads to una a decrease in hyaluronic acid, revealing wrinkles and loss of volume. Hyaluronic acid day 400 mg, with its highly concentrated formula, plumps the skin, fills wrinkles, and restores facial volume. Collagen is one of the main components of our skin, making up up to 80%. A high water content and abundant collagen give our skin a firm and smooth appearance. However, when collagen production decreases with age, wrinkles form, facial lines become accentuated, and the skin becomes drier. Gamma-aminobenzoyl peroxide gaba , the main inhibitor of the central nervous system neurotransmitter, is recognized. A study on its effects on the expression of type i collagen col1a1 and col1a2 demonstrated that gaba improves skin elasticity at the level of dermal fibroblasts by controlling the balance between the synthesis and degradation of type i collagen*. Day night hyaluronic acid 400mg, with its double contribution of hyaluronic acid and complete anti-aging gaba, reduces wrinkles, hydrates and plumps the skin, resulting in a rejuvenated face. *Effects of gaba on type i collagen gene expression in normal human dermatological fibroblasts. Eriko uehara et al., 2016