I find berberine and Ceylon cinnamon very helpful for my type2 diabetes. In my experience, some brands of berberine are even more effective than others. And I make certain to take CEYLON cinnamon rather than regular cinnamon as Ceylon cinnamon is safer for one's liver.
It's wise, of course, to do one's research regarding these products as well as for the foods and exercises that will be helpful and to test one's glucose levels as often as one's doctor recommends. Best wishes!