I doubt supplements would cause diabetes unless someone was taking ridiculous amounts of them or something...I don't know for sure but just wow, sounds ridiculous. Also, if supps did cause diabetes I don't think the two you mentioned would cause anything like that. I have heard that eating too many carbs over long periods of time can cause some form of diabetes but that is also if you are just loading up on carbs all the time and not eating enough of the other good stuff.