Is too much DHA dangerous?
DHA is simply a fatty acid. The average American diet contains 50 - 80 g of fat a day (50,000 - 80,000 mg!). Most of that is in the form of saturated fats, which is much more detrimental to health. It is very unlikely anyone could possibly ingest an equivalent amount of DHA a day. Like any fat, DHA is a source of calories, specifically, 8 calories per gram. Taking a relatively "large" dose of 5 g of DHA would add only 40 calories to the diet. Moreover, the body can absorb only so much fat at one time, and the rest passes through undigested.
It is true, however, that people who subsist on very large amounts of fish, such as the Alaskan Eskimos who's daily fish oil intake is in fact around 50 - 80 grams, do have thinner blood than non-fish eating people. This has helped them to avoid heart problems as a population, but they do seem to be more prone to strokes. Whether this is directly due to their high fish oil diet or a genetic predisposition is unclear.
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