[skrause]

> so there are some fairly radical changes in your body's chemical functioning as it goes into starvation and survival mode.

Ketosis is not a "starvation mode", it's just one of the normal ways your body provides energy. During most of human history people didn't have plenty of carbs available all day long, so ketosis was most likely the normal state and not an exception.

"Starvation mode" because of eating less is generally just a myth and an excuse for people why their diet failed.