Evaluation of Guava Leaf Extract Hair Tonic (Psidium Guajava L.) on Cosmetology Education Students at Medan State

The study evaluated a guava leaf extract hair tonic as a natural solution for hair loss among university students, revealing strong consumer acceptance and safe physicochemical properties. Conducted with 72 panelists, the tonic, formulated with 2% guava leaf extract, showed no irritation and high sensory satisfaction, with acceptance levels over 85%. The tonic's natural ingredients, including flavonoids and tannins, contribute to hair root strengthening and scalp health, aligning with sustainable beauty trends. These results suggest the tonic's potential as an innovative natural hair care product.