Coffee polyphenols extracted from green coffee beans improve skin properties and microcirculatory function

Area of Science:

• Dermatology
• Nutritional Science
• Human Physiology

Background:

• Coffee polyphenols (CPPs), notably chlorogenic acid, possess diverse physiological benefits.
• Xerotic skin, characterized by dryness, affects numerous individuals, necessitating effective interventions.

Purpose of the Study:

• To evaluate the impact of coffee polyphenols (CPPs) on human skin properties.
• To assess the effects of CPPs on skin microcirculatory function.

Main Methods:

• A double-blind, placebo-controlled study involving 49 female subjects with mild xerotic skin.
• Participants consumed a daily beverage containing CPPs (270 mg/100 mL) or a placebo for 8 weeks.

Main Results:

• CPP intake significantly reduced skin dryness, transepidermal water loss, and skin surface pH.
• Stratum corneum hydration and skin blood flow responsiveness to warming were notably increased.
• Levels of free fatty acids and lactic acid in the stratum corneum increased significantly.

Conclusions:

• Eight weeks of CPP consumption demonstrably improved skin barrier function and hydration.
• CPPs also enhanced microcirculatory function, offering a beneficial effect for mildly xerotic skin.