NAC N-Acetyl-L-Cysteine 500 mg

NAC N-Acetyl-L-Cysteine 500 mg and 4 near-identical products are sold under 3 different brand names — a near-twin Formula Twins cluster.

Product	Brand
NAC N-Acetyl-L-Cysteine 500 mg	Natural Factors
NAC N-Acetyl-L-Cysteine 600 mg	Natural Factors
NAC 600 mg	Health Thru Nutrition
NAC 600 mg	Health Thru Nutrition
N-Acetyl-L-Cysteine 500 mg	Douglas Laboratories