Earlier quoted context omitted.
> It absolutely can It can’t. There are many people who, if they simply scaled down their diet without otherwise modifying their nutrient intake/lifestyle, start having health problems well before they lose weight. Hot flashes, fainting, severe stomach pains, nausea.
This sounds false to me. I suppose for someone used to eating 10 to 20 thousand calories per day suddenly going to 1500 would be stressful but if gently tapered no one should have any issues.
But there are subtler versions of this. People who live in food deserts, only have access to iceberg lettuce and freezer-burned tomatoes as produce are gonna have a tough time getting all the nutrients they need in 2000 calories or less. There’s also others who have very specific dietary needs that they’re not yet aware of.