A new study has found a link between heavy vitamin B6 and B12 supplementation and lung cancer in men, especially men who smoke. The researchers report that the risk is two to four times greater for long-term users of the supplements compared to non-users.
The study analyzed data for just over 77,000 participants, age 56-70, in the VITamins And Lifestyle (VITAL) cohort study, a long-term observational study that examined the association between vitamin and mineral supplementation and cancer risk. Participants reported their vitamin B usage, including dosage information, for the 10-year period prior to the study.
