What is the Glycemic index? the Glycemic Index or GI for short, is a system that ranks food by how they affect your levels of blood sugar.Low GI food produce a gradual rise in blood sugar that's easy on the body. Foods with high GI numbers make blood sugar as well as insulin spike fast.
Research shows that eating low GI foods keep you healthier by:
Starve off Heart disease.
Reduces the risk of type 2 diabetes.
Curbs your appetite helping you to lose weight.
Gives you more energy.

The rule of thumb is to include at least One low GI food at each meal or snack.The list of low GI foods is too many to mention here. I will give you some examples of low GI foods:
Nuts, Vegetables,some fruits, those with high sugar content are not classed as low GI.
During the first two weeks it is recommended to eliminate carbs and only eat a low - carb diet.Healthy carbs such pulses are allowed.