DHA, Docosahexaenoic acid or cervonic acid is an omega 3 essential fatty acid, a carboxylic acid commonly found in fish oils and microalgae. DHA is found in beef and eggs, but can be derived from eicosapentaenoic acid, EPA, through docosapentaenoic acid, DPA. DHA has been discovered to restrain colon carcinoma cells in humans. DHA is found in large numbers in human brain and retina, half of plasma membranes of neurons is Docosahexaenoic acid. In recent times, due to changes in farming, DHA levels in common food have been decreasing, prompting the use of DHA as a food additive. DHA as a nutritional supplement is widely viewed as vital, Docosahexaenoic acid is also very often found in nutritional supplement compounds designated for pregnant women.