First congrats to your husband for doing such a great job with exercise and diet changes--those are very difficult to implement, so excellent work!
His A1C is overall very good, although not entirely "normal" as in "not diabetic." His average glucose is consistent with this A1C. He could be higher during the night as well as after meals so those are two areas you could investigate. Continuing with dietary and exercise changes are the best things he can do to prevent further increases in glucose levels. If it does come to needing medication, he is far from needing insulin right now. Oral agents would certainly be the first steps.
Cinnamon has some data but not a ton, but may be worth a try. Other herbs have less data in western trials, but I am not against them as long as they are not harmful to your husband be sure he discusses even herbal remedies with his doctor as well.
Tae care and all the best to you both.
Cinnamon is very good for the body.I have some systematic exercises for you.
These pranayam exercises will help control the diabetes and the side effects.Build up the timing gradually.If you feel tired or dizzy, stop and resume later(after about a minute).The benefits will be noticed in weeks as the sugar level is checked daily.Over the long term the diabetes will be in full control and the medicine(if any) can be reduced in consultation with the doctor.
Kapalbhati -(Do it before eating) Push air forcefully out through the nose about once per second. Stomach will itself go in(contract in). The breathing in(through the nose) will happen automatically. Establish a rhythm and do for 15 to 30 minutes twice a day.(Max 60 min/day)
Children under 15 years – do 5 to 10 minutes twice a day.
Not for pregnant women. Seriously ill people do it gently.
Anulom Vilom –
Close your right nostril with thumb and deep breath-in through left nostril
then – close left nostril with two fingers and breath-out through right nostril
then -keeping the left nostril closed deep breath-in through right nostril
then - close your right nostril with thumb and breath-out through left nostril.
This is one cycle of anulom vilom.
Repeat this cycle for 15 to 30 minutes twice a day(maximum 60 minutes in one day).
Children under 15 years - do 5 to 10 minutes twice a day.
You can do this before breakfast/lunch/dinner or before bedtime or in bed.Remember to take deep long breaths into the lungs.You can do this while sitting on floor or chair or lying in bed.
Also everyday, press the centre point of the palm of both your hands 40 times with the thumb and press the tips of all fingers 40 times each.
Also do this: kneel down, breathe out,pull in stomach, keep your both hands on stomach, bend forward and try to touch the floor with your forehead.Do this 3 times to stimulate the kidney and pancreas.
Continue the exercises once a day, after the diabetes is in full control.