✓ EASY ABSORPTION - Solgar NAC 600 mg is one of Solgar’s premium-quality amino acid range products, containing N-Acetyl-L-Cysteine, an amino acid which has powerful liver detoxification qualities. Solgar NAC 600 mg is one of Solgar’s premium-quality amino acid range products, containing N-Acetyl-L-Cysteine, an amino acid which has powerful liver detoxification qualities.