Here is one of the best Superfoods I know of. Water!
2/3 of adults and 3/4 of kids in the US don’t get enough water. Not having enough makes you tired, achy, congested, promotes headaches, slow lymph, and foggy thinking. If your local municipal water is full of unwanted contaminates get a filter. I would suggest a good Reverse Osmosis filter to get all the bad stuff out or buy high capacity jugs of spring water. The rule of thumb is half your body weight in oz. Don’t drink it all at once. Spread it out through the day. Your body will thank you.
Bonus: Keep up your good electrolytes by using some good quality Celtic salt instead of white table salt. Minerals and water go hand in hand.