A single Taco Bell tortilla wrap can contain 26 times the amount of aluminum that was associated with cognitive decline and dementia in a 15-year study.

Deep-frying carbohydrates in repeatedly heated seed oil, as with Cinnamon Twists, creates toxic AGEs (Advanced Glycation End-products) that lead to accelerated aging and visible skin damage.

Artificial colors like Red 40, found in Doritos Locos Tacos, have been found to carry benzidine contamination, which is a Group 1 carcinogen known to cause cancer.

Preservatives like calcium propionate and sodium benzoate, found in various Taco Bell items, have been linked in studies to decreased attention, sleep disturbance, and hyperactivity in children.

The preservative sodium metabisulfite, found in some Taco Bell products, triggers oxidative stress and inflammation and has been shown to kill or harm normal human cells in lab studies.

The combination of beef, cheese, and heat can create potentially carcinogenic compounds called nitrosamines and HCAs, which have been shown to cause DNA damage.

The antibiotics present in Taco Bell's beef supply can damage your microbiome and may even lead to antibiotic resistance.