Chocolate, these days they're putting castor oil extract in it to simulate "creaminess". Eat more than a couple ounces and you have the shits.
Now I buy only the artisan stuff, it's 5x more expensive, but at least it's just chocolate, at least 60% cocoa
Also, hamburger rolls. I remember when shell life was like, 10 days. Now it's 6 weeks. The stuff is loaded with chemicals and it fucks up my guts. Now I buy locally from the bakery. You have to eat it quickly otherwise it spoils
Yogurt, I buy only one brand now, expensive too, but it's just like the stuff I used to have as a kid
Fruits and veggies, I also stay away, with a few exceptions, like the watermelon I buy from the guy who comes from 6 hours away, but he lives in one of the best places in Brazoo to grow fruit, they have the perfect micro weather there and he used no pesticides, only organic ferts. I stopped eating watermelon for a while because I could taste the glyphosate, I swear. The day I ate his produce, it unlocked another childhood memory.