Eat food, not too much, mostly plants.
I personally think non processed meat is good for you, but that's a minor point compared to ultra processed vs not really processed foods.
I once argued with med students that Oreos (which are vegan) are not healthier than a steak.
Absolutely crazy and tbh frightening that anyone (let alone med students!) would think Oreos are healthier than a steak.
The reasoning of course is that processing and sugar content don't matter as much as any level of saturated fat.
https://nutritionsource.hsph.harvard.edu/healthy-eating-plat...