Nicole Avena: How Sugar Affects The Brain

TED
Nicole Avena: How Sugar Affects The Brain (script)
Summary
Sugar is a very sweet substance used to give flavor to food and drinks.The white sugar that we always consider as sugar is not the only form of sugar. The labels we check  when we buy something show sugar written in other forms: glucose, fructose, sucrose, maltose, lactose, dextrose, and starch also. Syrup, fruit juice, honey and tomato sauce also contain sugar. So sugar is everywhere.
Thus, we have to pay careful attention to food with high level of sugar. It is because your body produces more insulin to deal with the extra sugar we are eating to protect our bodies.  If it often has to, it makes our bodies tired and its system doesn't work well. Sugar causes dopamine to be released. We tend to seek  sugar only, so we can't eat varied kind of foods. There is a possibility that sugar could become an addiction..
We have to remember that eating sugar makes our brains hard to resist it but eating even a little bit of sugar makes us crave more.
We don't have functions to refuse eating too much sugar. I don't know whether sugar has strong effect or human wants are strong.
The English title is "How Sugar Affects The Brain"  Is this the reason?  why the Japanese title is "why we feel happy, when eat sugary food."

Words and sentences in this story
hook / a piece of metal or other material, curved or bent back at an angle, for catching hold of or hanging things on.
and ～also.  and also～. ～as well
sugar makes our brains hard to resist it = the brain that makes sugary foods so hard to resist
We become to seek only sugar, we can't eat variety foods.= We tend to seek sugar only, so we can't eat varied kinds of food=so we can't eat food of different variety .