If youre looking for a product that will make your hair appear fuller and thicker look no further than redken cerafill defy shampoo boasting cerafill system technology this shampoo will strengthen hair fibres to prevent breakage and energise hair follicles to re densify you hair improving the appearance of thinning looking hair the shampoo also nourishes to promote a healthy scalp environment benefits gently cleanses normal to thin hair to remove impurities contains ceramide to strength