Hey, so after reading some of Ray's work and some of the post in the forum I decided to understand why everything told here works. I found this video on the Krebs Cycle, and from my understanding, if you cannot metabolize glucose properly, you can't produce enough ATP and you produce less CO2. This is the reason why CO2 is a great indicator of low metabolism, am I correct or the reason is other? Also, why thyroid helps with glucose metabolization, and what other thing help this process? Thanks!