DDF C3 Plus Serum an extra light tri complex vitamin C with added (Matrixyl)to maximize the visible improvement of fine lines, wrinkles and loss of tone and firmness. May be used as a preventative as well as restorative treatment. Serum can be used alone and under other skin care creams. Visibly smoothes Improves firmness Boosts collagen Directions Apply a small amount to face and neck at bedtime. May also be used under make-up.