TFC8, Trigger Factor Complex, supports the performance of The Retinol Serum by creating the optimal environment for skin cellular renewal and guiding key nutrients to the skin.Additionally, the skin renewal properties of TFC8, Trigger Factor Complex, work in synergy with the skin cell turnover benefits of Pure Retinol for healthier, rejuvenated skin. TFC8,Trigger Factor Complex, helps protect against future aging, for a formula that both reduces visible signs of aging, while protecting against premature skin aging.