I started having noticeable issues with gastrointestinal symptoms and food intolerances early in life, if you can call diet sodas and artificial sweeteners “food.” I was about 12 years old when NutraSweet went on the market. It became immensely popular and was used in the diet sodas and sugar-free candies and gums all my tween-aged friends were drinking, eating and chewing. Personally, I couldn’t stand the stuff. It made me nauseated and bloated and made my mouth water sickeningly. Over the years, other so-called sugar substitutes came to market and I tried them all, but every one of them made me sick. My grandmother’s Sweet n’ Low was clearly poison and I never touched it. As for reacting badly to actual real food, that didn’t start until later.