The TB complex is predominantly a disease that infects cattle. Humans, on the other hand, can become sick, most often through consuming unpasteurized milk products from diseased cows. Raw milk sold in states where it is illegal to sell without federal regulation contains bacteria that can cause illness in humans. Even if you purchase milk that has been heated to destroy any harmful bacteria, some people are still at risk of getting sick because they develop allergies or other issues with their immune system. Drinking raw milk can also lead to legal problems for farmers because the law considers cows to be property, not livestock. In order for farmers to protect their investments, it is best not to put them at risk of injury or death by selling them raw milk. People who drink raw milk regularly should discuss its safety with their doctor. Those who have existing health problems or take medications may not be able to drink raw milk without risking being harmed by it. Anyone who suspects they may be allergic to milk should avoid it until testing confirms this fact. Drinking raw milk is not recommended as an effective way of preventing or treating tuberculosis.