Kensei
Master Fin Sharpener
I found this article pretty interesting. Nothing conclusive but I'll be following this research in the future. Although not mentioned in the article, University of South Florida has one of the top ketone researchers in the US with Dom D'Agostino... and he's also a very accomplished diver.
KETOGENIC SUPPLEMENTS MAY DELAY OXYGEN TOXICITY - DIVE Magazine
KETOGENIC SUPPLEMENTS MAY DELAY OXYGEN TOXICITY - DIVE Magazine