Is Fish Oil Full Of Mercury?

Q. I keep reading that eating fish is good for your heart, your brain and just about everything else. I am not fond of fish, so I have started taking fish oil capsules.
A friend says fish oil is contaminated with mercury. I hate to think I’m slowly poisoning myself by trying to improve my health.
A. The FDA cautions that large fish (shark, swordfish, king mackerel or tilefish) may be contaminated with mercury. Tests of fish oil capsules, however, have not revealed mercury. For more details on one such analysis, you can check the Web site of consumerlab.com.