I'm nearly the same age as you (turn 56 in June).
I guess to shorten my earlier point: if one's goal is to simply pass the next medical without taking heed of the warning that the glucose level is giving, one may pass the next medical, but put into jeopardy the ability to pass subsequent medicals.
I was just under the limits 5 years ago. I didn't pay sufficient attention then, but now the diagnosis got my full attention and I'm taking strong measures to do something about it. Flying is one thing, but living long and dying well are important too! Untreated or inadequately controlled diabetes will lead to a very poor quality of life in one's later years.