According to scientists, broccoli contains a chemical called sulphoraphane, which activates cancer-fighting enzymes inside cells. Researchers say the richest source of sulphoraphane is contained in sprouts.
In a demonstration of the plant's anti-cancer properties, investigators smeared broccoli sprout extract on the skin of six volunteers for three days, and then exposed them to high doses of ultraviolet radiation, which is the leading cause of skin cancer.
They found there was an average 37 percent less redness and sunburn in the patches covered by broccoli extract. Redness and sunburn are an indication of skin damage that could lead to cancer.
The results of the study are published in the journal Proceedings of the National Academy of Sciences.
Paul Talalay is a Johns Hopkins University molecular pharmacologist and the author of the study. Talalay says sunscreen conferred no protection against the UV rays, but he says that does not mean people should stop using it.
"We want to avoid under all circumstances people doing weird things like making broccoli sprout soup and applying to their skin and thinking that they will be protected against the sun," he said. "They will have not have any protection whatsoever, because it's a totally different mechanism and one cannot possibly substitute for the other."
Applied as a thick cream, sunscreen protects the skin by deflecting the sun's harmful rays. But it must be constantly reapplied to remain effective.
VOA article
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