Does selenium work?

Overall Effectiveness Rating for Selenium

The overall effectiveness rating for selenium is 2 out of 3. This rating means there is some evidence that using selenium may lead to positive results. This rating also means that some evidence does not back up all claims. Below you can find individual ratings for specific claims.

Overall Confidence Rating for Selenium

There are 2 studies in the database on selenium; the confidence rating is 20. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating. Note, this rating is for selenium as a whole. There are also individual ratings for the claims below.

Products Containing Selenium

Products Containing Selenium
1UP For Women
LEAN Pre-Workout
Animal Pump
Full list of all 6 products containing Selenium.

Individual Claims

The overall ratings above do no necessarily reflect each claim about selenium. Individual claims can have higher or lower ratings. For example, some supplements may have a lot of backing for one claim, but be completely useless for another. Click on claims below for more information.

Hormone Function Claims Effectiveness Rating Confidence Rating
increase testosterone

Mental Health Claims Effectiveness Rating Confidence Rating
improve mood


Title of Study
Effect of micronutrient supplementation on mood in nursing home residents
Effect of Zinc and Selenium Supplementation on Serum Testosterone and Plasma Lactate in Cyclist After an Exhaustive Exercise Bout