Effol Hair Root Liquid is an effective product that is unique to the market. Caffeine is the main active ingredient, which is of particular value in hair products due to it's amazing regeneration abilities! By going straight to the source and strengthening the actual hair roots this product promotes healthy new growth for a fuller mane and tail. Not only is it effective but Effol Hair Root Liquid is also super easy to use! Simply massage directly into the tail dock and crest.