give up at least some of his starchy favorites, he will always have a blood sugar problem. If he will cut down on the starchy foods it will help if he balances every starch he eats with a protein. My ex-husband was hypoglycemic and never had any problems with his sugar levels as long as he ate more protein than starch.

As for being able to completely control hypoglycemia with diet, it is possible unless there is another problem. During sickness...stomach virus etc. it is almost impossible to keep the levels under control if it lasts very long.