I'm reading up on metabolism things right now but I don't seem to understand what exactly Ketones are good for.
If I'm reading this right, normally, fatty acids get turned to Acetyl-CoA, which then gets turned to energy in the Krebs cycle.
During ketosis, the liver has to use the stuff that is necessary to do this for gluconeogenesis though, so it instead creates Ketones out of the Acetyl-CoA. But it looks like the only way Ketones can be used to get energy is to get turned back to Acetyl-CoA, so what exactly are the Ketones good for then if they need to get turned back into what it was before?
(Bonus non-biological question: And why do so many people strive for Ketosis if it's just an intermediate product that just gets turned back to the normal one later on?)