Oats are an effective mood booster because of their low glycaemic index (GI) – they slowly release energy into the bloodstream, which keeps blood sugar and mood stable (as opposed to providing a rush that dips quickly, leaving you feeling more irritable). Oats also contain the mood-boosting mineral selenium.
How much do you need? Half a cup of porridge is a great way to start the day. Try it with a spoonful of honey and nuts or yoghurt for added protein.