Antioxidant Complex Serum may be used by all skin types even acne skin. It gives skin the most powerful boost of antioxidants available. It is beneficial to apply daily with or without additional moisturizer. The biopeptides provide an instant firming and toning feel and with regular use the skin becomes healthier and stronger. Antioxidant Complex Serum is beneficial to use with Super C Serum and Drop Of Essence Hydration Drops and other RA serum concentrates depending on skin issue, this will enhance most skin regimens.