Hair growth is all about nutrition directly to the root of the hair and that is exactly what this vitamin based shampoo does. It uses amino acids to allow the root of the hair to build the protein strands as fast as the body wants. This means optimal hair growth. Faster Hair Growth! Healthier Hair Growth! Vitamin shampoo alone is enough to do the trick but we also recommend the Silk Protein Conditioner and Hair Nutrition Vitamins for those that are super serious about growing out their hair or are having problems with thinning or hair loss. Hair loss can also be caused by hormones in the scalp and dht blockers can be used to block the hormones. However Vitamins and Nutirtion should be used as 99% of those with hair issues are lackign nutrition to the root of the hair!