Coming round to exam time many of my peers complain about being under pressure to do well and as a result they are usually stressed and unhappy.
Being stressed isn't good for your mental health and can often lead to comfort eating or not eating at all which in turn is not good for your physical health.
My top tip would be to make sure you have a source of Omega-3 in your diet to aid brain development and cognitive function. It can be obtained from oily fish or a supplement.
By fuelling your body with healthy nutritious foods, you will feel good emotionally and physically.
However, by fuelling your body with unhealthy foods regularly this could amplify the effects of stress, resulting in poor mental health, which could effect exam performance!