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Nioxin System 1 for Fine, Natural, Normal to Thin-Looking Hair. This is 3-Part System contains the following ingredients to help regrow hair. BioAmp™ adds thickness and strength. Activ-Renewal™ gives a more youthful-looking scalp and fuller, healthier looking hair. Transactive Delivery System™ delivers essential nutrients onto the scalp which improves the appearance of thinning hair and creates an environment for fuller, healthier looking hair.