It's a DEEP rabbit hole to go down, but YES, what you eat most definitely affects your mental state!

Unfortunately, our current health care system emphasizes synthetic drugs over nutrition, so you won't get a lot of info from doctors on this, but there are a LOT of resources available to learn more. Plenty of good scientific studies out there to back up the claims too!

The short version is we need to eat a LOT less sugar, a LOT less processed food, a LOT less carbohydrates, and more whole foods, with an emphasis on vegetables.