BHA and BHT are antioxidants that help preserve food such as meat, cereal, etc. These actually react with oxygen, rather than the food itself. That way, the food gets to be preserved for a longer period of time. These types of antioxidants attract many people in wanting their food to last longer. With these preservatives, it becomes possible for people to store lots of food in their respective refrigerators.
However, these preservatives are chemically made. We are still not certain on whether or not these are healthy and that no side effects will be felt once they enter our bodies (when we eat them). Despite all this, the use of additives and eating them is still in question. I think that we should not depend ourselves in eating foods with preservatives, but rather to eat more on natural growing foods like fruits and vegetables.
In conclusion, although these antioxidants can help preserve our foods, we should still consider that they are still chemically made substance that might affect our bodies in the future.