On call: Selenium and diabetes
On call
Selenium is a mineral, not a vitamin. It's present in soil, but amounts vary from region to region. From soil, it finds its way into plants and then works its way up the food chain. Good sources include whole grains, tomatoes, onions, garlic, seafood, nuts, meat, and poultry. The Recommended Dietary Allowance for men is only 55 micrograms, but many men get less.
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