Formulated with vitamins, peptides, and amino acids, this hair enhancing serum helps to support hair follicle health for the appearance of healthier, thicker looking hair. See an improved appearance in 8 weeks, with full improvement in 4 months. GrandeHAIR serum is formulated to use on dyed hair and works for both men and women. Key Benefits: Formulated to use on dyed hair Works for both men and women Dermatologist tested Cruelty-free Research Results: In an expert clinical grader evaluation using GrandeHAIR: 97% saw improved hair thickness 97% saw less hair thinning *Based on a 16 week expert clinical grader evaluation with 39 subjects. Results will vary.