Correction to: Obesity Surgery (2021) 31:682–693

https://doi.org/10.1007/s11695-020-04943-0

In the original article, the units for vitamin B12 were incorrectly identified in Tables 1 and 3. The correct units are (ng/L). The same error also appeared in the “Results” section of the Abstract and in the “Vitamin B12” section of the article text.