This is nonsense. Often the off brand products are made in the same factories, to the same recipes as the name brand products, and only the packaging is different. It doesn’t happen for all products. Coca Cola, for example, is unique because they have a proprietary recipe. But baked beans, frozen waffles, etc. will have the same ingredients and the same preservatives whether you get Eggo frozen waffles or Aldi ones. 🙄 IF this is a real thing she’s experiencing, it’s psychosomatic. But she has form for shit like this and I simply don’t believe her.