Ok Sally, thanks for your valuable inputs.Ot helps him a lot.
Hi,
If he has type 2, then it definitely can be controlled with diet, if he is prepared to take action. His levels are not so high yet, so this is a very good time for him to take actions and to reverse this.
I would highly recommend he look into low-carb diet, and particularly avoiding all sugars. Some people use ketogenic, or paleo style diet.
When he loses weight, this alone may be enough to return his levels to normal. Cutting all added sugars, Low carb / Keto/ Paleo style (whole unprocessed foods) diet will also help with weight loss. There are some really supportive online keto / low carb communities, which he may seek out.
Exercise, will increase his energy levels and also make him feel better about himself.
I hope this can be a wake-up call to him.