I don't know what it is about doctors and vitamin supplements but I've found the response you've run into to be almost universal. Vitamins are not going to hurt you and may actually help you. Just dont' overdo the oil soluable vitamins like A, D and E. Lottsa B vitamins will help keep your metabolism working at a higher level and help you with burning those pounds, so by all means take your vitamin supplements.
Great test results btw!!