I'm sorry after being in hospital I was put on insulin. I never use over 3 units at a meal. Half time no insulin at meals. i take 6,000 units D-3 every day and my b-12 is fine that is what is so puzling. My A1c is 5.7 and colesterol ranges from 147 to 170 in past yr. and 1/2. By rights nothing is wrong with me.