My husband jokes that my family is the only family he knows who has dessert even after breakfast. And it's true. I grew up in a family that LOVES sugar. They are not much for drinking or fast food, but when the cake is passed, you're expected to say "yes."
I do believe that I grew up with way too much sugar in my diet (as do so many of us because, frankly, the sugar industry is dominating; not because our parents want to turn us into cookie monsters with hormonal imbalances) and, as a consequence, I carried too much weight in my teens, had emotional meltdowns, and kept reaching for sugary treats as an emotional bandaid whenever I was stressed, angry, sad, or felt lonely.
Many of the women who are now my clients experience these symptoms way beyond their 20s and well into their 30s, 40s, and beyond: too much weight, feeling emotional and irritable, (ab)using sugar, alcohol, coffee or bread/pasta as an emotional crutch or a quick energy booster, anxiety, PMS, painful and heavy or absent periods, acne, headaches, weak immune systems, sustained inflammation that leads to autoimmune diseases, and (unexplained) infertility... to name a few.