Every generation has some product/ingredient that they didn’t know was dangerous at the time: tobacco, lead, asbestos, etc. What is that item for this generation?
Sugar, especially in the US where it's literally added into everything. What's worse is the alternative (substitutes like aspartame) might also be a candidate and we just don't know it yet because enough time hasn't passed to study the long term effects. I try to take stevia as much as possible because it's more "natural", but only a few sugar-free products use it over aspartame. I read recently the WHO still considers aspartame as a carcinogen, but only in excessive amounts, like several glasses of soda a day.
I like excessive sweetness in all of my beverages since I've been drinking excessively sweet beverages all my life. I got the taste buds of a toddler. Still, give me aspartame over sugar, even on the off chance that the meager amount I consume gives me cancer some day that's probably better than what too much sugar would do to me.
Ive been buying no added sugar cranberry juice (5 cal/serving so low sugar even including the natural sugars) I pour it into a massive dispenser and water it down, basically 6 parts water to 1 part juice with the intent being it make slightly fruit flavored water - it still taste like juice! I can't imagine drinking it straight, we as a society are addicted to sweetness.
I stopped eating/drinking fake sugar because I felt like it desensitized my sense of taste. I felt like I was dulling my senses to what actually sugar was, thus making me eat more. Idk if that's actually true but it felt like it.