What’s the best ketone supplement?

I took them for a while during the fat-adaption phase, but once you are in ketosis, I dont think there is a need for expogenous ketones. Your body will make all that it needs.

They can help you get back into ketosis if you kick out due to carb intake.

I keep kegenics on-hand and I've used Keto-OS given to me by a friend a couple of times, but that's some expensive pyramid scheme stuff.