N-Acetylcysteine

N-Acetylcysteine and 2 near-identical products are sold under 3 different brand names — a exact-twin Formula Twins cluster.

Product	Brand
N-Acetylcysteine	Douglas Laboratories
NAC N-Acetyl-L-Cysteine	NutriCology
NAC N-Acetyl-L-Cysteine	Allergy Research Group