The study involving 250 participants, highlighted that a junk food diet comprising of meat, hamburgers, chips and soft drinks may in fact have the effect of reducing the volume of the left hippocampus in the brain. In contrast a diet containing fresh fish and vegetables may have the opposite effect.
Other previous animal studies have also demonstrated that depression and cognitive health are affected by diet quality. They also show that diets high in saturated fats and refined sugars have a very negative impact on proteins in the brain. Again in contrast to this, foods high in anti-oxidants and Omega 3’s actually have the opposite effect.