The USDA defines meat as “the flesh of an animal, lean and red, fresh, clean, and not frozen.” According to Taco Bell, the meat in their tacos is 97% meat. This means that the other 3% is composed of fillers like starch and sugar.
This compares favorably with other fast food restaurants, like Subway, who only have a meat content of 82%. This higher meat content may be one reason why Subway has been linked to increased health risks, such as obesity and heart disease.