Definitely. Most of the time I'm pretty sharp, although I definitely have days where I basically can't get anything done. I have just started using Anki to great effect (preparing for programming interviews is a nightmare if your brain is a sieve).

Since I know that my symptoms are almost entirely caused by diet, I have written down everything that I've eaten, every supplement that I've taken, every hour that I've slept, every noise or pain I feel in my stomach, and information about all of my bowel movements since 2017.

I thought I had things under control last year, and didn't take any notes for 2 months. Now I have an issue with H2S bacterial overgrowth, essentially a sulfur sensitivity. "If it can be measured, it can be managed."

The fact that I moved to Europe in October to avoid the pandemic and election nonsense, hasn't helped me. There are tons of supplements and tests that I would be able to get in the states that are simply unavailable in the country that I'm residing in. Pretty frustrating, and tbh, I can't wait to get back, hopefully late spring/summer.