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Nioxin System 4 for Fine, Chemically Enhanced, Noticeably Thinning Hair. This is 3-Part System contains the following ingredients to help regrow hair. BioAmp™ adds thickness and strength. Glyco-Color Shield™ Dual protection technology designed to safeguard the scalp skin and preserve hair color. Scalp Protection: Formulated with herbs and botanicals to moisturize and help guard the scalp skin from chemical service residues. Hair Color Protection: Custom-built molecular technology designed to provide CLINICALLY PROVEN* color protection and vibrancy. Scalp Access™ Delivery System™ helps protect nutrients as they moisturize and energize the scalp and hair combined with SPF 15 scalp protection against UV rays.