Is it true what Dr. Myhill says about ascorbic acid, "Vitamin C is toxic to all microbes and is a helpful part of treatment of the upper fermenting gut. Vitamin C is poorly absorbed which, for this purpose, is ideal! Microbes are present in the upper gut in millions, and in the lower gut in trillions. The idea is to gradually increase the dose until there is mild diarrhoea, i.e. one starts to kill lower gut microbes, then reduce. This is called taking vitamin C to bowel tolerance. Taken last thing at night on an empty stomach is an efficient way to use vitamin C."?
Would ascorbic acid be helpful for stomach and upper gut bacterial overgrowth?