Vitamin C with Q-C 500 mg

Vitamin C with Q-C 500 mg and 8 near-identical products are sold under 5 different brand names — a near-twin Formula Twins cluster.

Product	Brand
Vitamin C with Q-C 500 mg	Doctor's Best
Vitamin C with Q-C 1000 mg	Doctor's Best
Vitamin C with Citrus Bioflavonoids & Rose Hips	AN Amazing Nutrition Amazing Formulas
Polyphenol-C Complex 500 mg	Doctor's Best
BioImmune GSE 500 mg	Zazzee Naturals
Vitamin C with Q-C 1000 mg	Doctor's Best
Vitamin C with Q-C 1000 mg	Doctor's Best
Vegan Collagen Builder	Swanson
Vitamin C 1000 mg	Sports Research