1. Happiness is having the potential(physical and mental) to solve problems, deal with them. You will be happy if you are not addicted to anything in this world. Any form of addiction tries to decrease the dopamine receptors in brain and thus causing numb feeling.
2. Dopamine flow is required to solve real world problems. Don't ever mess with it.

1. Pomegranate contain polyphenols ( these are beneficial plant compound which have antioxidant properties ex. Punicalagin ).
2. Dry dates (reduces the plaques in between neurons)