Oily fish

Oily fish such as salmon, herring, mackerel and sardines are the main source of the important fats called omega-3s. Two of them - EPA and DHA - are not found in any other foods. These fats have a variety of benefits, including offering some protection against the decline of brain power and diseases such as Alzheimer's and Parkinson's. They are also anti-inflammatory, helping to minimise the pains of arthritis and rheumatism. In addition, they can help prevent blood clots, coronary disease and strokes.