If you have never:

→ Been on a keto diet
→ Fasted for more than a day
→ Taken exogenous ketones

You don't know what ketosis feels like.

Which means you're missing out on a powerful hidden feature of your biology.

Among other things, keto can greatly improve focus and cognition.

Co-Founder at sablier.com, and open-source developer. I have a broad range of interests, including longevity, epistemology, physics, and psychology.

I can verify this as on @prberg advice I started testing HVMN! 
Before I was trying fasting and with exogenous ketones it feels way more energising.

did keto and my bad cholesterol shot up. Doctor wanted to know what the fuck i was doing. Eating Mediterranean is more sustainable long term. Fasting is good.