Letter to the Editor: Comment on “Folate and vitamin B12 status is associated with insulin resistance and metabolic syndrome in morbid obesity”

We have recently read the article by Li et al. (Clin Nutr. 2018; 37:1700–1706) [ [1] Li Z. Gueant-Rodriguez R.M. Quilliot D. Sirveaux M.A. Meyre D. Gueant J.L. et al. Folate and vitamin B12 status is associated with insulin resistance and metabolic syndrome in morbid obesity. Clin Nutr. 2018; 37: 1700-1706 Abstract Full Text Full Text PDF PubMed Scopus (30) Google Scholar ]. Despite very interesting findings, it presents some data that intrigued us and raised questions adressed below.