Liver Guard is a Bio-Aligned Formula, designed to protect and defend you from the toxins and pollution that pervade the environment. Liver Guard addresses multiple body systems involved with optimal liver function, which is crucial to detoxification: liver cleansing and restoration, fat metabolism, antioxidant production and defense, and energy generation. Lipoic acid, silymarin and N-acetyl cysteine (NAC) are potent antioxidants that support healthy liver function. NAC is a precursor to glutathione, one of the liver's primary free-radical scavengers. And silymarin, the active flavonoid complex of the herb milk thistle, has been shown in vitro to inhibit lipid peroxidation of cell membranes.