Chen Y, Xu C, Xu H, et al. - In this study, the effect of H. pylori on serum homocysteine in a healthy Chinese population was explored. Researchers recruited a total of 21,184 individuals aged over 18 years who had undergone ¹³C/¹⁴ C urease breath test (¹³C/¹⁴ C-UBT) and blood tests and 5,042 individuals with follow-up intervals greater than 6 months. According to the Chinese expert consensus, homocysteine levels are classified. An association was found between H. pylori and serum homocysteine, and persistent infection leads to elevation of the latter.