I am not sure, but probably not on the exercise part. Since he runs the company and has sent for his son's return to run it. But I will take a look into r-ala as an option for him.
Given that r-ala did nothing for me I would say that it will do the same for him.
I was diagnosed 5 years ago and things like cinnamon, r-ala, chromium, and acetic acid all have a minor effect at best. Like the docs keep saying diet and exercise are by far the most significant at controlling the disease (next to insulin).
Insulin is required to metabolize food energy. So eating less calories (total and in smaller meals) is less challenging for compromised insulin function.
Exercise helps burn off extra energy/glucose. When exercise is intensive enough it improves insulin sensitivity (walking and golf are not intense).
There are no shortcuts to managing this condition and ultimately he has to choose to make the necessary changes to maintain his health.