You should have nutritional lab work taken before you undergo bariatric surgery.
It is important to start a supplement regimen if you find out that you have a vitamin deficiency as it is harder to catch up once you undergo bariatric surgery.
It’s important that you take Bariatric Supplements after surgery because of your dietary restrictions, and in some cases your ability to absorb vitamins. These supplements should meet the “American Society of Metabolic and Bariatric Surgery Guidelines" (ASMBS Guidelines). Over the counter supplements will no longer be appropriate after you have bariatric surgery.
It is important to take a lifelong commitment to supplementing the necessary supplements to combat your deficiencies after bariatric surgery.