Next time you feel a rage coming on, try reaching for some nuts and seeds to help calm you down. Research has shown that Omega-3 deficiency can contribute to aggressive behaviour of adult offenders and children with severe behavioural difficulties, while a Japanese study has suggested that zinc may ease anger in women.

To up your intake of these nutrients, try opting for walnuts and flaxseeds, which contain both zinc and Omega-3 fatty acids.