As the old saying goes, you are what you eat; and while everyone knows that poor nutritional choices can have a negative impact on your physical health, did you know that they can also affect your mental health?

The American Academy of Sleep Medicine takes insomnia so seriously that it has designated an Insomnia Awareness Day. According to their researchers, 30 to 35 percent of U.S. adults have at least brief bouts of sleeplessness. Around 10 percent have a chronic disorder. Left untreated, insomnia is more than a mere annoyance. In 2011, CNN reported that insomnia-related sick days and poor job performance drain $63 billion from the economy every year.

To spark your curiosity, here’s a list of some of the rarest diseases in the world. Hopefully, if you’re lucky, you’ll go your entire life without having to deal with one of these conditions up close and personal. Check it out and see if any of your obscure symptoms match a syndrome listed.

You have them for breakfast. You have them for lunch. You snack on them when you’re feeling peckish and, oh yeah, you also eat them for dinner. Avocados are more than just delicious. They’re good for you and even better for your Instagram feed. Sure, the tattoo might have been overkill, but your avocado addiction can actually be a good thing.