Yes, you have to take more vitamins than you did with the Sleeve. The most common to supplement are a multi twice a day, calcium 4-5 times a day in divided doses, and vitamins A, D, E, and K which your bariatric office will tell you to get in one ADEK supplement, but often you have to break down into the individual vitamins as labwork dictates, depending on your individual absorption. You'll have labs drawn several times the first year, then yearly afterwards to make sure you are getting enough vitamins and iron. But yes, vitamins daily are a way of life for SADI patients. It is also smart to take a probiotic, and sometimes you need extra B1 or B12.
Learning about macros is important! I highly recommend tracking your food through the Baritastic app, it will track your macros for you. Don't be surprised if your dietician is useless about things. Sadly, a lot of dieticians don't understand the proper eating routines for a SADI or DS patient and will give you advice meant for a RNY or Sleeve patient. That is why support groups like the Facebook one are so important, because the veterans of these surgeries often know a lot more about them that the surgeon or dietician do.
I know a lot about the SADI because I considered it before going with the DS surgery. So ask whatever you want and I'll see if I can answer it!