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Sulphur in the form of cystine appears to exert a protective action against exposure to solar radiation in low forms of life. Its high concentration in the epidermal tissues of higher animals suggests a possible protective action here also. Thus it appears that an adequate supply and a normal metabolism of sulphur exert a preventive influence against the pathologic effects of solar irradiation. Conversely, it is suggested that an inadequate supply of sulphur as cystine is an important cause of pellagra. Further, the distribution of pellagra and the variations in its prevalence and incidence suggest that solar irradiation, under certain
The Influence of Solar Rays on Metabolism, With Special Reference to Sulphur and to Pellagra in Southern United States.. Ann Intern Med. 1932;5:1042. doi: https://doi.org/10.7326/0003-4819-5-8-1042_2
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Published: Ann Intern Med. 1932;5(8):1042.
DOI: 10.7326/0003-4819-5-8-1042_2
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