Latopazora
but they are delicious. Actually the reason people are fat and unhealthy is because they're eating more than they burn. When you look at the standard american diet, the calorie count can be very staggering, when they're not active. (Not counting the body builders and athletes)
For as long as you're eating fruit, vegetables and complex carbs, I don't think fiber one is going to kill you.
For people who are underweight, I have no idea.
That's not how it works.
Your body can burn of glucose, protein, and fat pretty easily.
But when you eat fructose(which fibre one is loaded with) it gets sent straight to your liver and stored at fat. It is significantly harder for your body to burn off fructose, as it can only be metabolized in the liver, unlike glucose which your whole body can use.
When you start eating too much fructose(which is what Fibre One is sweetened with), you start getting health problems like Obesity, Type 2 Diabetes, Fatty Liver, Alzheimer's, PCOS, and a bunch of others.
And then there are the opposites who have an intestinal reaction(Fructose is considered to be the cause of IBS in 85% of cases).
Whichever reaction you have, it is bad.
(basically, people who eat a lot of fructose are either obese or dangerously underweight)