And I thought I was doing the right thing

Ascorbic Acid ( synthetic Vitamin C)

Any label that touts "Added Vitamin C" will usually come in the form of Ascorbic Acid. Beware that this not only kills off the bad bacteria, but also the good gut bacteria. Ascorbic acid is derived from corn starch, which these days in the USA is genetically modified, so now there is also that to consider.

The important thing to remember here, is that we want to preserve our good gut bacteria.

It shows us again how important it is to read our labels and if you are supplementing with Vitamin C to check what form it comes in.