While all stereoisomers have equal in vitro antioxidant activity, only the forms in the R -conformation at position 2 (noted 2 R ) meet the vitamin E requirements in humans (2)
The leaves and stems are known to harm the liver ( Still, several analyses of studies on the topic have found no evidence of liver damage in people who have taken these supplements in the short term, or about 1 to 24 weeks ( Therefore, people without liver injuries and those who are not taking medications that affect the liver may be able to use kava safely in appropriate doses for about 1 to 2 months (3)
H.et al (2018)
40, 2023, p
In response, the Natural Products Association (NPA) reached out to Amazon to let them know that the issue was not closed with the FDA, and that NAC is a product that has dual uses as both a drug and a supplement, like many other products on the market (such as niacin, fish oil, and potassium, which can be sold as over-the-counter supplements, or prescribed by a medical professional)
MG has received lecture fees from Menarini, RGM has no conflict of interest