Smoking is a very common addiction and a reason of many serious diseases of cardiovascular, respiratory and digestive systems and also a cancer. Active and passive smokers are exposed to nicotine and many carcinogenic products of tobacco smoke. Carotenoids (e.g. beta-carotene, lycopene) as natural, plant-derived antioxidants may decrease a risk of diseases connected with smoking. In accordance with literature, low level of carotenoids in blood plasma of smokers was observed and diet supplementation by carotenoids may compensate their deficit. However there are some reports in the literature that supplementation by high doses of beta-carotene may be dangerous for smokers.
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