From the studies I've read, Covid plays havoc on our gut bacteria, so the last time I saw my cardiologist I asked if it would be beneficial to empty my gut of all bacteria and start all over. Thankfully, he felt the benefits exceeded the risk and we did a two-week dumping and he suggested I use VSL#3 over the counter probiotic to rebuild the gut bacteria. Didn't get rid of the gut issue entirely, just made it a lot more tolerable.