@bitsygirl welcome to Mayo Clinic Connect. After reading your initial post in this discussion I’m a bit confused. Hoping you can clarify. You said that you have started monitoring your blood sugars in an effort to figure out why you have so much calcification in your coronary arteries. I’m not sure I understand the connection. I can respond to the topic of variations in blood glucose. Blood glucose is not a one and done lab. It is constantly changing throughout the day and is affected by so many things (what & when you ate, other health conditions, stress & emotions …..even the seasons and weather!) It is completely normal. As @collegeprof mentioned looking at trends and patterns can be more helpful in understanding if blood sugar is ok or if there is a problem. There are other types of testing and labs to do this. Are you interested in that sort of thing?