I'm also one of those people who finds it more convenient to eat 1 meal per day when busy. It also started in my early 20s, but I've never been on stimulants. I

I'm also one of those people who finds it more convenient to eat 1 meal per day when busy. It also started in my early 20s, but I've never been on stimulants. I got in the habit of eating irregularly in grad school which made it even easier to continue. I rarely have any appetite within an hour of waking up, and ive almost never eaten during this window. Not clear to me which is the cause vs effect. I know some people who are on the opposite end and have problems functioning after missing lunch. None of them have ever intentionally fasted, though again it's hard to separate cause from effect. What is clear is that different people's bodies form very different expectations surrounding food intake, and we are mostly unaware of this collectively.