Docosahexaenoic acid, or DHA, an essential fatty acid needed by the brain, is mainly found in animal products such as eggs and meats. The best source of this fatty acid is fish. Oily fishes in particular, including sardines, herring, salmon, mackerel and trout, are very rich in DHA.
DHA is an omega-3 fatty acid and a primary component in the structure of the brain. It's also good for the skin, the eyes and the reproductive organs.
Fish oil is the best dietary source of DHA, and pills containing fish oil are used as a dietary food supplement.
DHA has been proven to be beneficial for memory retention, and it may slow down the progression of Alzheimer's disease and help prevent strokes. It has been shown to inhibit the growth of cancer cells in mice. DHA is also beneficial for pregnant women and aids in the development of the unborn child.
Vegetarians, people following a low-fat diet and vegans, should supplement their diet with omega-3 fatty acids to improve health and mental performance. Diets that are very low on these fatty acids can cause a variety of health problems in the long run.
DHA can be extracted from a microalgae; when obtained in this way, the product is fully vegetarian.