Blood sugar is huge. I started using a CGM in 2020 and realized my morning low mood and difficulty waking up was bad hypoglycemia from crashing thru the night. Tried keto and now my blood sugar stays up like a champ. 

Agree on the parasites too. Much of the rest of the world does parasite cleanses of sorts. I have done a couple plus used ivm and I believe it to have increased my health.

I wish docs would start with simple things like blood sugar regulation for mental health and gen health probs. A CGM taught me so much about my body and its rhythms and cycles.