If you truly care about your own health, don’t eat toxic food; and if you truly care about the health of your mind, stay away from the input provided by traditional media.
Even if your genes are good and your physical foundation is strong, long-term consumption of junk food and aggressively engineered foods will eventually make you sick. Even those with high IQs will become intellectually weak if they constantly consume media input, propaganda, and the ideas others have chewed over.