Dietary supplement use by individuals living with and beyond breast, prostate, and colorectal cancer: A cross-sectional survey.

Background: Dietary supplements (DSs) are not recommended for the prevention of cancer recurrence. Although DS use is common in individuals living with and beyond cancer, its associations with beliefs about reduced cancer recurrence risk and demographic and health behaviors are unclear.

Methods: Adults (18 years old or older) who had been diagnosed with breast, prostate, or colorectal cancer were recruited through National Health Service sites in Essex and London.