What is the best way without meds to bring back blood a1c level to 6.0 which went up to 6.4 in the summer months taking sweet stuff. male 48 years of age?

A normal A1C level is below 5.7%, a level of 5.7% to 6.4% indicates prediabetes. Losing about 10% body weight, exercising at least 150 minutes a week and consulting nutritionist about diet are imperative. If that does not help, it would be prudent to see a doctor and consider taking medication.

The first approach is a proper diet, and the addition of a regular basis physical activity at least 3 times a week for a minimum of 30 mins, also depending on your body Mass distribution, you may need to be like 2 or 1 month on a caloric deficit to achieve those goals.