Ingestion of Coffee Polyphenols Improves a Scaly Skin Surface and the Recovery Rate of Skin Temperature after Cold Stress: A Randomized, Controlled Trial

Abstract

Summary Coffee polyphenols (CPPs) derived from coffee beans have beneficial effects on blood pressure and vascular endothelial function. In addition, CPPs suppress ultraviolet light induced erythema. However, the effects of CPPs on dry skin and cutaneous vascular function have not been clarified. We investigated the effects of CPPs on dry skin and the recovery rate (RR) of skin temperature after a cold-stress test as a measure of vascular function in subjects with visible scaliness in a double-blind, placebo-controlled, randomized study. The subjects were divided into two groups, the CPP group and the Placebo group. In the CPP group, the subjects ingested a beverage containing 297.8 mg CPPs every day for 4 wk. The degree of skin dryness was assessed quantitatively using a Visioscan to evaluate skin scaliness and smoothness. A subjective evaluation using a visual analog scale (VAS) of skin smoothness was also used. As a result, the scaliness and smoothness of cheek skin was significantly improved after 4 wk in the CPP group compared to the Placebo group. The improvements of the VAS score on 'skin smoothness' and the RR were also observed in the CPP group but the difference was not statistically significant. However, when the CPP group was divided into subgroups of high RR and low RR, the improvement of the RR was significant in the low RR subgroup. In conclusion, our results suggest that CPPs improve skin scaliness and play a role in cutaneous blood flow regulation after cold stress.

Effects of Chlorogenic Acids on Menopausal Symptoms in Healthy Women: A Randomized, Placebo-Controlled, Double-Blind, Parallel-Group Trial

“…Based on the above results, the continuous intake of CGAs was expected to enhance parasympathetic nerve activity, improve sleep quality, and reduce daytime fatigue. The continuous intake of CGAs has also been reported to alleviate high blood pressure [31] and improve cutaneous blood flow regulation after cold stress [32].…”

Plant-Based Foods for Skin Health: A Narrative Review

“…106 Daily consumption of a decaffeinated beverage containing 297 mg of coffee polyphenols for 4 weeks significantly improved scaly skin in the cheeks and around the mouth in Japanese women aged 25 to 35 compared with a control drink. 107 In another study, the daily intake for 8 weeks of a 100 mL decaffeinated beverage with 270 mg coffee polyphenols containing mainly chlorogenic acid significantly improved skin permeability barrier function, as evidenced by a decrease in dryness, TEWL, and pH, as well as an increase in stratum corneum lipids, lactic acid, and hydration, in 49 women with dry, itchy, and cracked skin compared with controls. 108 Roasted coffee beans contain 7.95 to 8.75 mg/g of total polyphenols that could decrease to 1.17 to 1.58 mg/g after 12 months of storage.…”

Functional Foods in Dermatology

“…The turmeric group showed a trend toward decreasing TEWL among participants with higher sebum concentrations, while the supplement group showed a statistically significant decrease in TEWL. Foods that contain polyphenols are another area of interest, such as green tea, coffee, and cocoa beans [20][21][22][23]. Extracted food polyphenols have shown promise in improving dry skin via impacts on skin barrier water homeostasis, but whole food studies are lacking.…”