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Which of the following in NOT a direct benefit of a regular walking regimen?
Reduce Stress
Improved immune function
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Improved sugar metabolism

 
 
 Minerals: Iodine 
 

Some early studies correlate low iodine levels with an increased risk of breast cancer. These low levels usually correlate with low selenium levels as well, more classically associated with cancer. A higher incidence of breast cancer has been shown to occur in the goiter belt, whereas areas with high soil levels of iodine and selenium show a lower incidence.

Requirements: The RDA for iodine in adults is 150 mcg. The amount necessary to prevent goiter is about 1 mcg./kg.-that is, about 50-75 mcg. for most adults. Average intake from diet ranges from 65 mcg. to about 650 mcg. Much of that may come from iodized salt, which is not highly recommended; however, it is very difficult to avoid salt completely in our culture because it is added to so many prepared foods and by restaurants and mothers everywhere. A 6-ounce portion of ocean fish contains about 500 mcg. of iodine, more than is contained in one teaspoon of salt but without the extra 2 grams of sodium. Ideally, we can meet our iodine requirements by eating seafood, seaweed, and vegetables grown in iodine-rich soil. A typical mineral or complete vitamin supplement will contain the RDA, 150 mcg., of iodine per day. More iodine is needed during pregnancy and lactation. People on low-salt diets may need supplemental iodine.

(Excerpted from Staying Healthy with Nutrition ISBN: 1587611791)
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 About The Author
Elson Haas MDElson M. Haas, MD is founder & Director of the Preventive Medical Center of Marin (since 1984), an Integrated Health Care Facility in San Rafael, CA and author of many books on Health and Nutrition, including ...more
 
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