Do you have any citation about that?

For some reason, I suppose I read it somewhere, I though that for ketosis you need 36 hours.

I did a protein diet for a while and used Keto Strips to check for ketosis. I'd be in ketosis uaually 2-3 hours after noticing I was hungry, roughly 8-12 hours after the last meal.

Just buy strips and check yourself. You might need much less time

sorry, what are strips?

There are tester strips for detecting presence of ketones in urine, originally intended for type I diabetes I think.

You can buy ketone strips that will indicate whether you are experiencing ketosis. They react to your urine.

Holy shit, I had no idea this was a thing. This is awesome. I am totally buying this.

Where can I learn the science of ketosis. So I can be more data driven regarding my health.

Reddit has a good keto community, here are some links from the sidebar:

https://www.reddit.com/r/keto/wiki/keto_in_a_nutshell https://www.reddit.com/r/keto/wiki/faq

also https://www.reddit.com/r/ketoscience/

Thanks, I had no idea.

depends on your glycogen reserves and basal metabolic rate