Fish Oils: Health Benefits, Facts, Research
Written by Christian NordqvistReviewed by Natalie Butler, RD, LD
Knowledge center
Last updated: Thu 6 October 2016
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Fish oils come from fatty fish, also known as oily fish; specifically the tissue of fish such as trout, mackerel, tuna, herring, sardines, and salmon.
The fillets of oily fish contain up to 30 percent oil, but this figure varies. White fish, on the other hand, only contain high concentrations of oil in the liver, and have much less oil overall.
Apart from omega-3 fatty acids, oily fish are a good sources of vitamins A and D. Whitefish also contain these nutrients, but at much lower concentrations.
http://www.medicalnewstoday.com/articles/40253.php
