Eat Tyrosine! Dr. Brynn's Brain-Based Productivity Boosters Dopamine is the 'action hormone'. Serotonin is the 'happy hormone'. Both neurochemicals requires the amino acid 'tyrosine' to be produced in your brain and body. Tyrosine is found in foods such as: meat, fish, dairy products, beans, nuts, seeds, avocados, chocolate, coffee, bananas So this week, to be more productive and give your brain a boost - eat more tyrosine!