Strengthen and moisturize your hair with Nioxin’s System 1 Scalp Therapy Conditioner for Natural Hair with Light Thinning. Lightweight, this professional hair care product helps retain moisture balance, providing hair resilience thanks to the BioAMP technology. Designed to strengthen the hair and amplify hair structure, Nioxin's density-protecting System 1 Scalp Therapy Conditioner is the second step of a 3-part Nioxin regimen, delivering fuller looking hair.