Selenium is crucial for making glutathione peridoxase. Healthy people could use 200 mcg daily, but those who are sick or have a degenerative illness could use more. The US Department of Agriculture suggests North Amercian adults should supplement with 150 mcg daily, and notes that the consumption of Se in amounts that exceed the Recommended Dietary Allowance (RDA) may protect against prostate and colorectal cancer. Reduce selenium depletion also by reducing your exposure to arsenic in drinking water. While selenium's therapeutic window is 200-600 mcg daily, cancer and viral studies used 1,100 mcg. Selenium is toxic but 3,200 mcg taken daily for a year produced only deformed fingernails, which soon grew out. |