Firefighters' diet study shows promise for lowering cancer markers

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age 18+ * Active SF firefighter * Willing to consume a plant-based diet (vegetables, fruit, whole grains, legumes, etc.) * Willing to complete 4 clinic visits Exclusion Criteria: * Weight \< 110 lb * BMI \>= 40 * Self-reported uncontrolled hypercholesterolemia, hypertension or diabetes * Pregnant, lactating, or planning to become pregnant during the course of the study. * Use of any of the following drugs/supplements within the last 2 months: * systemic antibiotics, antifungals, antivirals, or antiparasitics (intravenous, intramuscular, or oral); * corticosteroids (intravenous, intramuscular, oral, nasal or inhaled); * cytokines; * methotrexate or immunosuppressive cytotoxic agents. * Chronic, clinically significant, or unstable (unresolved, requiring ongoing changes to medical management or medication) pulmonary, cardiovascular, gastrointestinal, hepatic or renal functional abnormality, as determined by medical history, Type 1 diabetes, dialysis * History of active cancer in the past 3 years except for squamous or basal cell carcinomas of the skin that have been medically managed by local excision * Unstable dietary history as defined by major changes in diet during the previous month, where the subject has eliminated or significantly increased a major food group in the diet. * Recent history of chronic excessive alcohol consumption defined as more than five 1.5-ounce servings of 80 proof distilled spirits, five 12-ounce servings of beer or five 5-ounce servings of wine per day; or \> 14 drinks/week. * Any confirmed or suspected condition/state of immunosuppression or immunodeficiency (primary or acquired) including HIV infection, multiple sclerosis, and Graves' disease. * Surgery of the GI tract, with the exception of cholecystectomy and appendectomy, in the past five years. Any major bowel resection at any time. * Regular/frequent use of smoking or chewing tobacco, e-cigarettes, cigars or other nicotine-containing products * Regular use of prescription opiate pain medication