if you’re not going to be able to take oral vitamins … a patch is better than nothing,” Dr. Michael Russo, a bariatric and cosmetic surgeon based in California, said earlier this year.

the patches were less effective in post-bariatric surgery patients compared to oral supplements, as users demonstrated more deficiencies in vitamins D, B1, and B12 after one year. The study in the ...

Roux-en-Y gastric bypass (RYGB ... performed a prospective study that evaluated the effects of RYGB on vitamin D, calcium, and parathyroid hormone (PTH) levels. The serum levels of vitamin ...