https://www.onhealth.com/content/1/diabetes_complications#:~:text=Diabetes%20Tips%3A%20Managing%20and%20Living%20With%20Diabetes%201,Put%20Out%20the%20Smoke.%20…%20More%20items…%20

New recommendations state that all adults over age 18 with type 1 diabetes should test daily. (Older recommendations suggested starting at age 25). Self-monitoring for type 2 diabetes also has benefits, but the benefits aren’t nearly so clear if you don’t take insulin. In that case you should check with your doctor.
By Charles Patrick Davis, MD, PhD