The human brain is nearly 60 percent fat. Without unsaturated fats in your diet, your brain cannot produce acetylcholine and without this, your brain cells will become ‘stiff’. You will suffer memory loss and your thinking speed will deteriorate. Fat-free diet will kill your brain cells. try to eat more fish to get omega3, avocado, seeds(sesame, sunflower, pumpkin)
For creative thinking do breathing exercises
By using exercises which relax your muscles or yoga, it is possible to lengthen the electrical EEG waves recorded in your brain. these bigger brainwaves are associated with an increased probability that you will have ‘brainwave’ as a creative or inventive inspiration.
The effect of aerobic exercise
Aerobic exercises enhance thinking performance. Brain activity is fuelled by oxygen and aerobic exercise increases the supply of oxygen to the brain. Fresh air, fresh thinking, fresh ideas.
Dark chocolate boost the brain
Dark chocolate boosts your brain while protecting you from heart disease and cancer. Eating about 20-150 g a day of dark chocolate can improve your learning and memory. Improved blood flow carries more oxygen to the brain, enabling you to think quicker for longer. Eating dark chocolate increases your mental speed and energy because it contains the brain stimulant theobromine. Theobromine works as a brain stimulant by relaxing muscles helping to dilate veins and arteries thus allowing blood to flow more easily to the brain.

In addition to that dark chocolate contains PEA(phenylethylamine). PEA activates the neurotransmitters in your brain that control mental attention, concentration and alertness.
Furthermore, dark chocolate contains anandamide – a cannabinoid brain chemical known as a ‘Bliss chemical’, because it produced in the brain when you feel good.
Dark chocolate work by allowing increased levels of anandamine and dopamine to circulate in the brain. It is the high level of anandamide and dopamine that distinguishes the brains of children from the brain of most adults because, in general, as you get older the levels of these neurotransmitters decrease. You are as young as you feel and think and dark chocolate can help you to keep your youth.