1. Increases your risk of Diabetes
A study  showed that your risk of diabetes increases 1.1% for every 150 calories of sugar you eat.
2. Give you the blues
Live Science published a study  linking the consumption of sweets with a 40% increase in depression. How? Those with higher resistance to insulin produce less dopamine, the hormone and neurotransmitter that makes you feel good.
3. Increase fat storage
Sugar doesn't just add calories, but it increases the storage of fat in the wrong places: the back of your thighs and your belly.
4. Raise cholesterol
High sugar intake leads to both high levels of bad cholesterol and triglycerides (fat in storage form), as well as low HDL cholesterol (the good stuff).
5. Make you wrinkly
Sugar does damage both inside and out. It causes your skin to sag and wrinkle, and breaks down the fibers of elastin and collagen--the proteins that keep your skin looking good.
6. Limits blood flow
High insulin causes abnormal growth of the cells of your arterial walls, causing the constriction of your blood vessels and limiting blood flow.
7. Makes you sleepy
Sugar highs ALWAYS lead to the inevitable sugar crash. High blood sugar levels cause your body to produce insulin to lower it, but it always lowers blood sugar too low--hence the sleepy, drowsy feeling of post-sugar bingeing.
8. Addicts you to overeating
Eating too much sugar screws with your appetite, stopping your brain from receiving the signals sent by the hormone leptin telling it that it's had enough to eat. No wonder most people binge-eat sugary foods!