No 200 blood sugar levels are not normal one needs to bring them down to 140 after eating.
Yes not consuming sugar can help maintain blood sugar levels and also prevent adrenal exaustion which is caused due to sugar consumption.
Over time, high blood sugar can damage blood vessels and the nerves that control your heart. This can make one suceptible to heart attacks or a stroke.
A fasting blood sugar level of 99 mg/dL or lower is normal, 100 to 125 mg/dL indicates you have prediabetes, and 126 mg/dL or higher indicates you have diabetes.
Medically fasting is discouraged in patients with high blood sugar levels and heart diseases. It can have a detrimental affect on health specially for people living with type1 and type 2 diabetes.