Avocado and Guacamole Consumption and Colorectal Cancer Risk: The Multiethnic Cohort Study.

Area of Science:

• Nutritional Epidemiology
• Gastroenterology
• Oncology

Background:

• Dietary fiber and phytonutrients are recognized for their potential protective effects against colorectal cancer.
• Low consumption of these beneficial nutrients is prevalent in the United States.
• Avocados are a rich source of fiber and phytonutrients, suggesting a potential role in cancer prevention.

Purpose of the Study:

• To investigate the association between avocado and guacamole consumption and the risk of developing colorectal cancer.
• To analyze this relationship across different demographic and racial/ethnic groups.

Main Methods:

• A prospective cohort study design was employed within the Multiethnic Cohort Study.
• Food frequency questionnaires assessed avocado and guacamole intake, categorizing participants into low, moderate, and high consumption groups.
• Colorectal cancer incidence was tracked via Surveillance, Epidemiology, and End Results (SEER) Program cancer registries.

Main Results:

• No significant association was observed between avocado/guacamole consumption and overall colorectal cancer risk after adjusting for covariates.
• Subgroup analyses by anatomic subsite (right colon, left colon, rectum) and race/ethnicity also revealed no significant associations.
• The trend test for increasing consumption levels showed no statistically significant reduction in colorectal cancer risk (p for trend ≥ 0.06).

Conclusions:

• This large prospective cohort study found no significant link between consuming avocados or guacamole and the risk of colorectal cancer.
• The findings suggest that, within the studied population, avocado and guacamole intake does not appear to modify colorectal cancer risk.
• Further investigation into specific phytonutrients and fiber sources may be warranted for cancer prevention strategies.