Foods which are said to help fight depression and anxiety Brazil nuts - very rich in selenium, which research shows may help prevent low mood. • Peas - good source of vitamin B1 needed for healthy nerves. • Liver - very rich in iron and vitamin B6. Low levels can exacerbate the depressive system of premenstrual syndrome. • Sardines - rich in potassium, iron and B vitamins - all needed to maintain healthy brain chemistry. Omega-3s in oily fish may help overcome certain brain disorders. • Dark chocolate - the feel good factor comes from the flavour, aroma and the way it melts in your mouth. Chocolate with a high cocoa solid content - greater then 60 per cent - also contains a feel good chemical called phenylethylamine. • Chillies - help promote the release of pleasure-boosting endorphins in the brain. • High fibre breakfast cereal - rich in carbohydrates to boost blood sugar and fortified with B vitamins for a healthy nervous system. • Bananas - supply mood-boosting carbohydrates and vitamin B6.