Treat your color-treated, thinning hair with Bosley Defense Nourishing Shampoo For Color-Treated Hair, a gentle shampoo that helps promote thicker and fuller hair. Bosley Defense Nourishing Shampoo For Color-Treated Hair helps to develop and maintain a healthy scalp and stimulate healthy hair growth while preserving and extending the life of hair color. This sulfate-free cleanser washes away buildup and toxins like DHT from the hair and scalp. DHT is a main factor in thinning hair and hair loss. Bosley Defense Nourishing Shampoo For Color-Treated Hair contains a unique ingredient blend called LifeXtend Complex that strengthens and nourishes hair follicles. Get fuller, thicker-looking hair with this effective solution for weak, thinning hair.