Clinical tests show Hair Plus increase hair growth up to 123% in 28 days. The shampoo supplies proteins to protect the hair shaft, strengthens, prevents dryness and breakage, improves gloss, texture, manageability, adds body. The conditioner is specially formulated to supplement the shampoo - they must be used together for optimal results. The active amino acids derived from enzyme hydrolysis and vitamin B-6 stimulate more rapid hair growth.