3% Lactobacillus Ferment Complex strengthens the skin barrier against irritants and contaminants that compromise skin and make it more susceptible to damage. It does this by optimizing the balance of probiotics (good) bacteria that help stimulate the skin’s natural protection and renewal factors. This moisturizer supports the skin's natural protective system, fighting damage from environmental factors. Our skin naturally fights back against all kinds of negative daily stimuli within our environment. Feel's Probiotic Moisturizer, loaded with high concentrations of probiotic actives, helps skin fight back even stronger. The probiotic complex activates genes that strengthen skin, boost firmness and hydration levels, and strengthen the skin barrier. This protects deeper skin layers against the external factors that cause aging and wrinkles. 50ML Aluminum Tube.