Plantur 39 Phyto-Caffeine Tonic was created for women who wish to reduce hair loss, but either don’t want to wash their hair every day, or need to use a different shampoo than Plantur 39 Phyto-Caffeine shampoos. This tonic contains caffeine against the negative impact of testosterone, as well as the hair vitamins niacin, zinc salts and bio-active substances (e.g. genistein from the soy plant) for stronger hair growth. Once applied, the Phyto-Caffeine Tonic penetrates the hair follicle where it forms an active ingredient depot that provides protection for up to 24 hours.