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Efficacy of Antioxidants in GI Cancer Prevention - Cochrane for Clinicians - American ...

Feb 1, 2005 - There is no evidence that supplementation with beta carotene or vitamins A, C, or E prevents GI cancer. Data for selenium is inconsistent and based on poor-quality studies, and supplementation with this mineral should not be recommended routinely. Most importantly, combinations of ...

American Family Physician : Cochrane for Clinicians

https://www.aafp.org/afp/2005/0201/p465.html

Cochrane for Clinicians - Dec 1, 2004 - American Family Physician

Dec 1, 2004 - Combined evidence from two clinical trials of calcium supplementation lasting for several years revealed a reduced rate of recurrent colorectal adenoma. However, evidence is insufficient to recommend supplementation with dietary calcium for patients who have never had an adenoma.

American Family Physician : Cochrane for Clinicians

https://www.aafp.org/afp/2004/1201/p2109.html

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