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Some dietary supplements have been tested by third-party organizations to confirm that they contain the ingredients listed on their labels and do not contain any harmful chemicals

33 This article updates previous articles on this topic by Langan and Zawistoski, 4 and by Oh and Brown

Since betanin is the main active ingredient in beetroot, the researches on the antioxidant activity of beetroot are mainly concentrated upon betanin, and a small number of studies focus on the antioxidant activity of polyphenols (KossMikoajczyk et al., 2019)

You can use them, but you must read the mL markings instead of unit markings

[Randomized controlled study on adjuvant immunochemotherapy with PSK in curatively resected colorectal cancer

Vural P, Akgul C, Yildirim A, Canbaz M: Antioxidant defence in recurrent abortion