Each capsule delivers 600 mg of **N-Acetyl-L-Cysteine (NAC)**, a form of the amino acid cysteine that your body uses to produce **glutathione** — your cells' primary antioxidant and detoxification molecule. At the suggested two capsules per day (1,200 mg total), you're right in the middle of the clinically studied range of 600–1,800 mg, well-supported for replenishing glutathione levels, supporting liver health, and helping break down mucus in your respiratory tract.

The formula includes 25 mcg of **selenium** per capsule (50 mcg daily) as L-selenomethionine, a highly bioavailable form. Selenium activates one of the key enzymes in your body's antioxidant defense system, so pairing it with NAC means you're getting both the raw material for glutathione production and the mineral that helps put it to work. The 50 mcg daily dose is close to the 55 mcg RDA and well below the 400 mcg upper limit.

NAC has moderate clinical support across liver health, immune function, and cellular protection. Rather than acting as an antioxidant itself, it feeds your body's own glutathione production — working upstream to strengthen your natural defenses.