You don’t have to go out of your way to avoid BHA or BHT. The nutritional benefits of, say, a whole grain cereal with the additives outweigh any risk. But because their health effects are still unclear, limit how much you consume, especially from snacks and sweets, which are not healthful foods anyway. Eat more fresh and minimally processed foods, which contain few or no additives and are usually more nutritious overall. You can also look for packaged foods that use other preservatives, such as vitamin E or have no preservatives at all.