The explanation is as follows.
The more simple sugars you eat, such as in candy, the faster the sugar ends up in your bloodstream and the more insulin gets released to control it. First, the sugar is converted to glucose. What happens next is that the increased levels of insulin by the body as it tries to regulate the blood sugar level leads to increase production of fat which is pushed into the cells as storage for later use. Glucose is the main fuel of the body. We convert fats and carbohydrates to glucose as we need it in order to have the energy we need to live. However if you eat too much of simple sugars and other simple carbohydrates, or foods with a high glycemic index, you increase your risk of weight gain, lower your energy levels, and run the risk of type 2 diabetes and other health problems.
So thus simple sugars are made into complex ones in golgi apparatus.
Hope it answers your question.
All the best!