Avaliação da pele e cabelos oleosos, desenvolvimento e eficácia clínica de formulações cosméticas contendo extrato de guaraná

The study evaluated the effects of guaraná extract in cosmetic formulations for controlling oiliness in skin and hair. It found that guaraná extract, rich in caffeine and catechins, effectively reduced lipid content, sebaceous gland activity, and porphyrin levels on the face and scalp without affecting skin hydration or barrier function. The formulations were well-received by participants, indicating good efficacy and acceptability, which is crucial for long-term treatment adherence. The study suggested guaraná extract as a multifunctional active ingredient for oily skin and hair care products.