Exogenous ketone levels should ideally be maintained within a 1 to 3 millimolar range for optimal benefits.

“So that's probably not a good thing. So, I'm of the opinion personally and experimentally by...you know, in the idea of keeping exogenous ketones within like an elevation of 1 to 3 millimolar. I think it's pretty optimal unless you're managing like a very serious form of epilepsy, or you have glucose transporter type 1 deficiency syndrome or some other inborn error metabolism where having higher ketones can be favorable because you have a decrease in other metabolic pathways or transporters like in the case of glucose transporters deficiency.”