Lentils are complex carbohydrate, they have the added benefit of helping to increase the brains production of the feel-good neurotransmitter serotonin. This results in a calmer, happier state of mind with less anxiety.
They are also high in folate – deficiencies in folate have been linked to depression and mania. Lentils can also boost your iron levels – which will give you energy and therefore put you in a better mood.