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Bryant J. Webber, MD1, Karyn J. Ayers, MD, PhD2, Brad S.

Laetrile (Amygdalin) has shown little anticancer activity in animal studies and no anticancer activity in human clinical trials. Laetrile is not approved for use in the United States. Learn more about the use of Laetrile for cancer in this expert-reviewed summary.

Milk thistle is available in the United States as a dietary supplement and small studies have been done in several cancers. The U.S. Food and Drug Administration has not approved milk thistle as a treatment for cancer or other medical conditions. Learn more in this expert-reviewed summary.

Older adults should be screened for fall risk annually. Community providers (people without formal medical training who work with older adults in senior centers or aging services) may be a viable group to expand the reach of screenings.

Find out what magnesium is and what it does in your body, what foods provide it, and about magnesium supplements.

Find out what vitamin D is and what it does in your body, what foods provide it, and about vitamin D supplements.

Smokeless Fact Sheets.

Surgeon General's Reports on Smoking and Tobacco Use by year.

Secondhand Smoke Fact Sheets.

Marc Fischer, MD1, J. Erin Staples, MD1 (Author affiliations at end of text).