Restore your hair with Nanogen Intervention For Men (60 tablets). Natural & side effect-free this one month supply will help to promote natural growth as well as improving the overall condition of your hair. Key Ingredients: Amino Acids: Provides the building blocks for healthy hair. Cysteine: Gives hair a shiny strong condition. Biotin: Supports amino acid metabolism thats essential for building the hair shaft. Vitamin B6: Essential for energy metabolism in the hair shaft