Nonsense. The only people making revenue are Kelloggs, Kraft etc. Not everything has a self-serving motive. Just look at obesity rates in the US and you know something is terribly wrong with the food we’re eating. If you care about people, heck if you just care about healthcare costs, you should want to figure this out.

For keto, the main thing you need to know is that if you are on high blood pressure or diabetes meds you can have dangerously low blood pressure or blood sugar on keto. Seriously, don’t try it without medical supervision lest you pass out in the bathroom. For anyone not on meds, you may need more salt than you’d otherwise have. Otherwise it’s fairly safe. There’s nothing harmful about ketones. They can help with epilepsy. Maybe your brain runs better on them without epilepsy, so it’s worth a shot to find out. Docs prescribe bipolar people seizure drugs and it works for some reason, so it’s not an unreasonable hypothesis.