Peanut butter can protect people from cardiovascular sickness. Peanut butter (and peanuts) have lots of protein, E, magnesium, folate, food fiber, and arginine. However, some people with peanut allergies can have a shock or allergic reaction from eating or smelling it, which has made some schools decide not to let their students eat peanut butter in their schools. Some oils put inside peanut butter to make it easier to spread can also make people have heart disease. Peanut butter can also carry salmonella and make people sick because of it.