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LIGHT AS A THERAPEUTIC AGENT

JAMA. 1922;79(10):827-828. doi:10.1001/jama.1922.02640100047017.
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That sunlight is beneficial to those forms of living matter represented by green plants is an every-day observation. Through the intermediation of chlorophyl, light energy is stored under conditions most advantageous to mankind. There is a widespread conviction that sunlight is health-giving to man as well as to vegetation; but proof of this traditional belief is not so easily secured. Sunlight is only one of numerous environmental factors to which the human organism is subject, and they cannot readily be dissociated so that each can be charged with its specific responsibility for well being or the reverse, as the case may be. The physics of radiation, including the phenomena of light rays, has progressed to a stage, however, at which it may be expected that the behavior of light to living matter in the animal as well as the plant kingdom will become elucidated. A recent writer1 has pointed

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The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
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