While the whole world is crazy about sugar, doctors have time and again reminded us of its horrendous side effects. However, sugar is something not everyone can quit, and so, many people choose substitutes – and even they rarely live up to the promise. So now, scientists say they have found a rare sugar that comes from most plants, thanks to a new, cheaper way to make it. A new study from Tufts University has come up with a way to make tagatose - a rare sugar that tastes just like table sugar but has way too few calories and less impact on your blood sugar.