We’ve all been fed the dangers of sugar since childhood, mostly at how candy rots your teeth and is unhealthy. And sugar, like so many things, is bad when not properly moderated. This may sound like a surprise, but a natural sugar known as glucose is essential in our diet. Our bodies even reward us for eating it. That said, the modern diet often contains extremely excessive amounts of added sugar which is not all glucose. High dental bills are one thing, but sugar can lead to potentially lethal results, like cancer, diabetes and heart disease.