While sugar provides you with energy, high blood sugar levels accompanied with high cholesterol can lead to heart disease. Excess sugar stored in the body turns into fat and excess weight, which adversely affects your body's ability to process fuel properly. This problem affects your cardiac and pulmonary system.hile sugar provides you with energy, high blood sugar levels accompanied with high cholesterol can lead to heart disease. Excess sugar stored in the body turns into fat and excess weight, which adversely affects your body's ability to process fuel properly. This problem affects your cardiac and pulmonary system.