I want to tell you fantastic news! The first is that the disease is not something that is inevitable to aging and the second-food you eat can confront the disease and aging.
The simplest thing you can do for your health is to avoid sugar.
When we say sugar, we mean the food that is quickly released as sugar (glucose) in our blood, simple carbohydrates or carbohydrates with high glycemic index (GI). Proper nutrition will be based mainly on food that has GI below 50 and occasionally food that has a value between 50-70. Food with higher value should be consumed with food high in protein, which would slow the release of sugar into the bloodstream. 
Sugar is released into the bloodstream and it is delivered to cells in the brain and muscles as a source of fuel. When the sugar in the blood crosses the appropriate limit, the body reacts by producing insulin (hormone produced in the pancreas). If sugar is not needed for the production of energy it will be stored in the form of fat. The more sugar we take, the more insulin we produce. More insulin, more fat to be stored and there will be no degradation of earlier deposited fat. Over time the body becomes less sensitive to insulin. The body is forced to produce more of it (insulin resistance). Second as the result of this, body produces free radicals -the main causes of premature aging and degradation of proteins.
When sugar falls we feel hunger. When we feel hunger body produce glucagon, hormone responsible for burning the existing fat for energy production.
Besides sweets, potatoes, biscuits, bread, pasta and chips, body identically reacts to stimulants such as caffeine, nicotine, alcohol.
You have a problem:
- if you’re sleepy after waking up, and you need coffee, cigarettes to clear your mind and to boost your energy
-you always need to eat something sweet
-you can’t lose weight
- after meal you feel that your energy level is low
-during the day you often change the mood and have problem with concentration
-you don’t have energy for physical activity
-when you have a longer time without food you are nervous or dizzy
- you can’t handle the stress
-you often have headaches…
l think that most healthy people can allow themselves occasional “cheat meals” without quilt. The best principle is 80/20- if you eat 80% of good food most of the time, enjoy 20% in food you desire.
Inform yourself about GI here.