Abstract
Hair loss occurs in many people, so it can reduce the cosmetic function and protect the body and head from the environment. Hair loss is a disorder in which the number of hairs is less or more than normal. Hair tonic includes cosmetic preparations that have a liquid form with the function of maintaining hair health, stimulating hair growth, and strengthening hair. Caffeine is a substance that can stimulate hair growth. The purpose of this study was to determine the activity of a hair tonic preparation containing caffeine that can stimulate hair growth in guinea pigs. The results showed that hair tonic caffeine Formula 1 with a concentration of 0.001% with an average hair length of 18.294 mm had high effectiveness in stimulating hair growth compared to Formula 2 with a concentration of 0.005% with an average hair length of 16.610 mm.
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