I am testing this theory currently. Now I am not a huge fan of blueberries. I dunno why that is as I love strawberries 🍓 but I just read an article that says blueberries boost your mood within 2 hours of consuming them. I will let you know in 2 hours if I feel happier. As a result, blueberries are not just delicious but also more helpful than any other berry. They are one of the superfoods that boost your serotonin levels and put you in a happy mood. You can eat them as a snack or add them to your yogurt for an even better result. Currently I put some blueberries into a protein shake which will not only give me energy but boost my mood. The key behind blueberries' ability for mood booster is the anti-oxidant flavonoid. Blueberries are rich with anthocyanin, a type of flavonoid that gives the dark blue pigment of blueberries. Flavonoid-rich food such as blueberries has shown to have a measurable effect on positive mood. Are you a fan of blueberries?