Carotenoids and carotenoids plus vitamin E protect against ultraviolet light-induced erythema in humans

Auteur(s) :
Sies H., Stahl W., Heinrich U., Jungmann H., Tronnier H.
Date :
Mar, 2000
Source(s) :
AMERICAN JOURNAL OF CLINICAL NUTRITION. #71:3 p795-798
Adresse :
"STAHL W,UNIV DUSSELDORF,INST PHYSIOL CHEM 1;POB 101007;D-40001 DUSSELDORF, [email protected]"

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Background:
Carotenoids and tocopherols, known to be efficient antioxidants and capable of scavenging reactive oxygen species generated during photooxidative stress, may protect the skin from ultraviolet light-induced erythema, beta-Carotene is widely used as an oral sun protectant but studies on its protective effects are scarce.

Objective:
The objective of this study was to investigate the protective effects of oral supplementation with carotenoids and a combination of carotenoids and vitamin E against the development of erythema in humans.

Design:
A carotenoid supplement (25 mg total carotenoids/d) and a combination of the carotenoid supplement and vitamin E [335 mg (500 IU) RRR-alpha-tocopherol/d] were given for 12 wk to healthy volunteers. Erythema was induced by illumination with a blue-light solar simulator. Serum beta-carotene and alpha-tocopherol concentrations and skin carotenoid levels were assessed by HPLC and reflection photometry.

Results:
Serum beta-carotene and alpha-tocopherol concentrations increased with supplementation. Erythema on dorsal skin (back) was significantly diminished (P < 0.01) after week 8, and erythema suppression was greater with the combination of carotenoids and vitamin E than with carotenoids alone.

Conclusion:
The antioxidants used in this study provided protection against erythema in humans and may be useful for diminishing sensitivity to ultraviolet light.

Source : Pubmed
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