Sentinel Selenium is a dietary supplement containing 100 micrograms of selenium per tablet, with 50 tablets per bottle. Selenium is an essential trace mineral that plays a vital role in antioxidant function, thyroid health, and immune system support. Selenium is a crucial mineral that works as an antioxidant, helping protect cells from damage. The recommended daily allowance for adults is 55 micrograms per day. This supplement provides 100 micrograms per tablet, which is a common supplemental dose. The bottle contains 50 tablets and features a safety seal to maintain freshness. As with any supplement, consult with a healthcare provider before use, especially if pregnant, nursing, or taking medications.