Your blood type determines your susceptibility to illness, the way your body absorbs nutrients and it dictates the diet and exercise plan that will suit you best. They can cause inflammation and lead to disease states.
Sugar is toxic, causing the body to release insulin and store excess body sugar as body fat.
He believes hyperinsulinism is the reason for diabetes, heart disease, high BP, etc. May exacerbate kidney disease and gout. Excess insulin causes intense and recurring cravings for carbohydrates and can heighten ability to store fat. This is caused by a hormonal imbalance. The human body has no physical need for carbohydrates, they should be completely avoided.