These statements are my own, I'm not a doctor, and before changing your diet in any way, you should always consult with your physician.
So you found out that fish is good for you and you want to eat more.. but wait, what about all that mercury and other heavy metals that you hear so much about? Well not only is it in fish, it's in other foods as well. It's also found in the air we breathe and the water we drink. Don't try holding your breath just yet. There are many ways to help your body get rid of these heavy metals. You can still enjoy tuna without worry!
Natural Chelation happens when mercury exits your system. There are natural ways to promote this such as sitting in the sauna or eating a variety of fruits and vegetables.
Fiber aids in absorbing heavy metals while passing through the digestive system.
Fermented foods can bind to heavy metals in our digestive system and allow these foods to pass through without causing too much of an issue.
Fish highest in the heavy metal category are shark, tuna, king mackerel, and swordfish. Small fish like mackerel, sardines, and anchovies are less likely to have high heavy metals. Larger fish such as shark, tuna, king mackerel, and swordfish are usually higher unless you know your source. In a perfect world, we would all know the sources of everything we eat however, that can be very time consuming. As long as you are getting fiber from various sources, you shouldn't worry too much about heavy metals.