Yes. Ixcela Protect contains 20 mcg of selenium per capsule. The recommended dietary allowance is 55 mcg per day, with the safe upper limit being 400 mcg. Selenium is a trace mineral, which means that it is needed in small amounts for good health. However, too much selenium can result in neurological effects, brittle hair, and deformed nails. Selenium toxicity is rare and unlikely to occur via diet and low-dose supplementation.