Hello, welcome to Diabetes Forum. His A1c of 7.8 shows he is running a lot of high blood sugar. If he gets better control and reduces the A1c to 6.5, or less, then his weight loss may stop. An A1c below 6.0 is considered a non diabetic level. many diabetics are able to maintain that level. Doing that makes diabetes complications much less likely.
Ask all the questions you want. we are here to help.
Exercise, diet and portion size are all very important. A low carb diet is strongly advisable. I east only 130 carbs per day and exercise every day. My A1c is 5.6. I have been a diabetic for 64 years and am very healthy.
Just popping in to say Hi & welcome, ljb. Glad you've joined us and I hope we can give you support and some peace of mind about caring for your son & his diabetes. Don't be afraid of insulin - it's a life-saving tool for controlling diabetes. Some of us utilize everything available - diet, exercise, oral meds and insulin. Whatever it takes to keep those blood sugars low, and live a long happy life!