Back to Search
Start Over
Ingestion of Coffee Polyphenols Improves a Scaly Skin Surface and the Recovery Rate of Skin Temperature after Cold Stress: A Randomized, Controlled Trial
- Source :
- Journal of nutritional science and vitaminology. 63(5)
- Publication Year :
- 2017
-
Abstract
- 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.
- Subjects :
- Adult
medicine.medical_specialty
Patient Dropouts
Erythema
Visual analogue scale
Surface Properties
Medicine (miscellaneous)
Coffea
Gastroenterology
Severity of Illness Index
law.invention
030207 dermatology & venereal diseases
03 medical and health sciences
0302 clinical medicine
Randomized controlled trial
Double-Blind Method
Japan
Re-Epithelialization
law
Stress, Physiological
Internal medicine
Dry skin
Immersion
Ultraviolet light
Medicine
Ingestion
Humans
Cold Injury
Skin
Nutrition and Dietetics
integumentary system
business.industry
Plant Extracts
Polyphenols
Blood flow
Hand
Blood pressure
Regional Blood Flow
Dietary Supplements
Seeds
Female
medicine.symptom
business
Skin Temperature
030217 neurology & neurosurgery
Dermatitis, Exfoliative
Subjects
Details
- ISSN :
- 18817742
- Volume :
- 63
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Journal of nutritional science and vitaminology
- Accession number :
- edsair.doi.dedup.....93240785d609428a5c4521049e327101