A variety of carotenes, including both those that are precursors of vitamin A and those that are not (section 11.2.2), can act as radical trapping antioxidants under conditions of low oxygen tension.

As discussed in sections 7.2.4 and 7.2.5, there is epidemiological evidence from a variety of studies that high blood levels of carotene are associated with low incidence of a variety of cancers. However, again the results of intervention studies have been disappointing; in two major trials there was an increase in the incidence of lung cancer among people taking supplements of P-carotene (section 7.2.6).

A Disquistion On The Evils Of Using Tobacco

A Disquistion On The Evils Of Using Tobacco

Among the evils which a vitiated appetite has fastened upon mankind, those that arise from the use of Tobacco hold a prominent place, and call loudly for reform. We pity the poor Chinese, who stupifies body and mind with opium, and the wretched Hindoo, who is under a similar slavery to his favorite plant, the Betel but we present the humiliating spectacle of an enlightened and christian nation, wasting annually more than twenty-five millions of dollars, and destroying the health and the lives of thousands, by a practice not at all less degrading than that of the Chinese or Hindoo.

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