What is fish oil?

Fish oil: Fish oil is the oil found in many cold water fish, such as mackerel, tuna, salmon, sturgeon, mullet, bluefish, anchovy, sardines, herring, trout, and menhaden. It's rich in omega-3 fats -- essential to our diets because our bodies cannot make them. You can also get this in supplement form -- at least 1-2 grams of epa and 500mg dha per day if you have depression.

Grease: Or fat from fish like salmon or others, used as a supplement to fight inflammation.

Concentrated: to contain varying amounts of the omega-3 EPA and DHA, sold as dietary supplements or prescription Lovaza or Vascepa