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NOW said although quality has improved, there were three potency failures and two heavy-metal issues among the 19 brands the company tested.
NOW (Bloomingdale, IL) released the results of its latest testing of lesser known supplement brands that sell glutathione on Amazon. NOW said although quality has improved, there were three potency failures and two heavy-metal issues among the 19 brands the company tested.
“The quality of these lesser known brands purchased on Amazon is greatly improved, but we are still finding unacceptable lapses,” Dan Richard, NOW’s vice president of global sales and marketing, said in a press release.
NOW performed one test in its quality labs and another independently at Eurofins using high-performance liquid chromatography (HPLC). Its findings were that two brands, called Emily Bright and Northern Crown tested above Prop 65 levels for lead. Additionally, Eco-Taste, a new brand sold directly from China, had the lowest test results of all the brands, measuring only 55% of its labeled claim of 500 mg per capsule. See the table for more results.