A339 Is transdermal multivitamin patch effective in gastric bypass patients?

Laparoscopic roux-en-Y gastric bypass (LRYGB) patients are recommended to take multiple vitamin supplements daily. Transdermal multivitamin patches are being advertised for use in bariatric patients with no data to support its efficacy. The purpose of this study was to evaluate response to daily transdermal use of multivitamin patch after LRYGB and comparing them with a control group of similar patients who used oral supplements.