I remember the time when I was little... There was a saying which said something about how much colesterol had the eggs and that there were forgiven to eats more than two eggs in the same day because it was very bad for your health. Nowadays, we know about two different types of colesterol (one "good", one "bad") and there are studies about the eggs that even consider them as food with incredible properties.
Something similar happens to diet soft drinks like "Coca-cola Zero" for example. They say that it is so bad for health; so bad that even it could create cancer in your body. But the reality is that none of that is demonstrated yet. If it were possible I think this product would be out of the market for good.