Take the capsule test:
You can check whether fish oil is rancid by cutting a capsule and smell and taste it. The smell and taste of fish in Omega products indicates that the oil is rancid. If you burb or say “hi” during the day, that is a clear evidence that the oil is oxidized. Your body will be in lack of vitamin C and E, which are our main antioxidants.
Liquid fish oil hides nothing.
Find out what occean area your fish oil comes from, what kind of fish is used and whether it is from farmed or from wild fish. Watch out for terms like “selected fish”, “cold waters” ……………….