Coffee pulp supplement affects antioxidant status and favors anti‐aging of skin in healthy subjects
Ya‐Ping Tseng, Cheng Liu, Leong‐Perng Chan, Chia‐Hua Liang
Abstract
BACKGROUND: Coffee and coffee products are known potentially to reduce levels of oxidative stress biomarkers in humans. OBJECTIVE: This investigation evaluates the effects of coffee pulp extract as a functional supplement (in coffee pulp drink, CPD) and a cosmetic ingredient (coffee pulp serum, CPS). PATIENTS/METHODS: The effects of CPD and CPS for anti-oxidation and anti-aging were investigated. Forty subjects were randomly allocated to CPD or placebo drink groups (50 ml of a CPD/placebo drink daily for 8 weeks for each subject), and another 40 subjects were recruited to CPS or placebo serum groups (about 3 ml of a CPS/placebo serum day and night/daily for 4 weeks for each subject) in a double-blind study. RESULTS: , 43.8% and 15.3% (p < 0.05) for NO· than placebo. The inhibition of tyrosinase activity was increased by 91.6% and 51.0% (p < 0.05) after CPD and CPS application. The CPD comprehensively improved the moisture, brightness, elasticity, spotting, texture, and collagen content of skin for most subjects after 8 weeks, relative to the baseline without treatment (p < 0.05). After 4 weeks of CPS serum consumption, the brightness, elasticity, spotting, UV spots, and collagen content of skin were slightly better than those at week 0 (p < 0.05). CONCLUSIONS: The daily consumption of coffee pulp extract products can slow the skin aging process and improve skin health.