I am 71. I have not taken my bariatric vitamins in years. My pcp put on iron 3 days a week and 5000 iu of d3 a day and b12 last week. I have since contacted him about starting back on bariatric vitamins and he said if I wanted to do that I can. I have not seen a bariatric dr in years. Should I be comfortable just starting the vitamins on my own even though my pcp said its ok?