Selenium in Men

Selenium belongs to a group of nutrients called trace minerals, which are inorganic compounds that the body needs in small amounts. Selenium combines with proteins in the body to make compounds called selenoproteins, many of which function as enzymes to allow chemical reactions to take place. Some selenoproteins act as antioxidants. While selenium is required in small amounts for good health in both men and women, some studies suggest that it can be beneficial to prostate health in men.

Functions of Selenium

The selenoproteins that act as antioxidants help neutralize unstable molecules called free radicals, preventing them from causing damage to cell membranes. If free radicals accumulate faster than antioxidants neutralize them, they can damage cell structure, contributing to chronic diseases like cancer and heart disease. Selenium also combines with various enzymes that regulate thyroid hormones, which control metabolism and several other body processes.

Selenium and Cancer

The Office of Dietary Supplements notes that observational studies indicate that death from cancers, including prostate cancer, is lower among people with higher blood levels or intake of selenium. According to these studies, selenium not only has antioxidant properties, but can also slow the growth of existing tumors. More studies are needed regarding the role selenium can play in preventing prostate cancer.

Selenium Recommendations

After the age of 14, selenium recommendations are the same for all men, at 55 micrograms per day. According to "Nutrition and You" by Joan Salge Blake, most men easily meet -- and even exceed -- their selenium needs, consuming between 80 and 160 micrograms per day.

Sources of Selenium

Selenium is found in a wide variety of foods including nuts, shrimp, crab, salmon, pork, chicken, whole wheat bread, milk and various fruits and vegetables. It is important to note that the selenium content of the foods you eat can vary dramatically even between the same types of food. This is because the selenium content of a particular food depends on where the food was grown or where the animals from which you obtain food grazed. Some soil is rich in selenium, while some soil contains little to no selenium. While selenium is available in supplement form, it is best to meet your selenium needs through the diet, however, because selenium-rich foods offer other nutrients as well. It is important to consult a physician before taking any selenium supplements.