I'm a caregiver to my live-in partner. He had a stroke, is diabetic that is controlled by medication and diet. He will not drink or eat his foods that need sweetener unless I add 3 to 4 packets. He use to only ask for 1 but now is up to 3 and sometimes demands 4 in his coffee and oatmeal. This seems like too much artificial sweetener. Any advice on side effects since he already had a stroke a year ago.