This is a phenomenon known as biomagnification – when a toxin becomes more and more concentrated in an organism higher up on the food chain.To demonstrate, take a look at those tiny frowny faces up there. They represent the presence of mercury or methylmercury in our fish friends. On the far right, you have the krill (let’s call him Kevin) and anchovy (Arthur). Kevin and Arthur typically feed on plankton or single-cell plants and spend most of their time trying not to get eaten by anything else. While Kevin and Arthur do have some mercury accumulation in their tissue, it’s only the bare minimum amount that comes with just living in polluted water. In comparison to the rest of the ocean’s population, their levels of mercury are impressively low. Moving further up the food chain, we find herring and eel (and for continuity of humanization, let’s call them Harold and Eric). While Harold and Eric do also feed on plankton, algae, and other plants, they eat the smaller fish in addition. In eating these smaller fish, the mercury levels within their tissue are a little bit higher than Kevin’s or Arthur’s, because they are absorbing Kevin and Arthur’s contaminated tissue, alongside the toxins in the polluted water. Our next step up leaves us with the salmon (Sally the Salmon). Sally eats all those guys in front of her, absorbing all of their contaminated tissue, all the while still breathing in the polluted water. Sally’s mercury levels are much higher than any of those to her right. And, with her even longer lifespan, she has more time to eat more fish, breathe more toxins, and accumulate more mercury in her tissue. She’s got it bad.
So while salmon oil is not by any means bad for you or your pet, it does present a higher risk of toxins than the lower fish. All three fish oils are great (non-plant) sources of EPA and DHA, which, going back to our fat charts, is best for carnivores who lack the ability to convert ALA to EPA and DHA. (If all of that seemed like a bunch of mumbo jumbo to you, take a peek at the omegas post to clear up the confusion).
“Over time, an individual who consumes plants or prey contaminated with methylmercury will acquire levels greater than in either its habitat or its food. As a result, top predators acquire greater body burdens of mercury than the fish they consume”
With anchovy and krill oil among its Omega-3-and-6-rich ingredients, our Glimmer supplement is a natural way to support healthy skin and a shiny coat.