The powder cayenne contains capsaicin , which improves blood circulation while reducing cholesterol .

辣椒粉富含的辣椒素可以促进血液流通，同时降低胆固醇含量。

A recent study suggested that capsaicin is an effective defense against a fungus that attacks chili seeds .

一项最新研究显示，辣椒素是一种抵御真菌侵染辣椒种子的有效武器。

Unfortunately , once the capsaicin has penetrated the skin , it 's nearly impossible to get off .

很不幸，一旦辣椒素渗入皮肤，它几乎不可能被去除。

Some use menthol or camphor , others use cayenne or capsaicin , a derivative of hot peppers or methyl salicylate .

一些人使用薄荷醇或樟脑，还有一些人使用辣椒素（一种辣椒提取物）或冬青油。

They contain capsaicin , the chemical that gives them their distinctive taste and which boosts your resting metabolic rate by 25 per cent .

它们富含辣椒素，这种化学物质能带给你独特的口感，并能让你在休息时提高25%的新陈代谢水平。