Quite a bit, it turns out. They're some of the hottest new sources of omega-3 fatty acids available in supplement form.
As the public starts to recognize the importance of omega-3 fatty acids for overall health, the hunt for sustainable sources of this nutrient intensifies. The fact is, there simply is not enough salmon on the planet to nourish every brain on the planet. We're going to have to learn to use other sources for that than relying solely on wild Alaskan salmon.
Here's what we found out about three unique players you're seeing more of: green-lipped mussels, krill, and calamari.
Here's the real reason this shellfish gets its name. As you can see, there is a rim of green pigment on the lip of its shell. This bivalve is a native of New Zealand, and the farming process bringing them to market is sustainable. We love that!
However, there seems to be a bit of hype related to this product. It is related to an anti-inflammatory compound found in these mussels that supposedly helps to relieve arthritis. The studies are sketchy, and seem to concede that the effect is actually due to the omega-3's in these mussels, not any secret special ingredient. The capsules are pretty low dosage wise, about 50 mg EPA and little information about DHA content. Meaning you're going to have to take an awful lot of these capsules to get any effect, and you're going to spend a lot of money in the process. Sixty capsules, in the dose we recommend here, is going to cost you $33. That's more than you need to spend.
This teeny, tiny, shrimp-looking thing is a krill, a creature at the very bottom of the food chain that grows in pretty much all ocean waters. It's an important food source for marine life — 500,000,000 tons are produced each year, and over half of it is consumed by whales, penguins, seals, squid, and fish.
As an omega-3 supplement, it is often touted as the superior source. However, a Norwegian study published in January of this year comparing krill oil to fish oil concluded that the effects of supplementation were comparable. In other words, there was no unique benefit to taking krill that could not be achieved with fish.
The bigger issue is sustainability. Scientists reported an 80% drop in krill supply recently. Given the heavy dependence of much of the rest of the ocean on krill, this is important to note. Whole Foods Market actually stopped selling krill oil over concerns that it was not a sustainable product. One voice countering these arguments is, Dr. Joseph Mercola, the popular natural medicine advocate. It is important to note that Dr. Mercola is personally invested in the krill industry so he has much to lose from consumers heeding the warnings of the National Geographic Society and the well-researched buyers at Whole Foods. He is entitled to his opinion, as you are to yours. All I ask is that you consider the financial influences underlying his opinion before deriving your own.
Bottom line here is, if there are options that are equally as effective that do not create nutritional hardship for such a wide variety of important citizens of the planet, we prefer to use those. Krill is not on our recommended list.
Which brings me to my last, and favorite, of our three profiles. The unassuming squid!
Last fall inCYST intern Sarah Jones and I were at our local Sprouts Market evaluating omega-3 supplements. Sarah noticed a bottle made from calamari. The supplement clerk told us that this is an up and coming concept, designed to bring a sustainable source of EPA and DHA to a market that is starting to feel ecologically strained in trying to meet the consumer demand for fish oil. Calamari is sustainably farmed and has been for a long time. It is only recently that they have been used as a source for the supplement industry.
Since we first saw their capsules, Carlson's has also released a lemon flavored liquid product called CalaOmega. And it is concentrated — one teaspon contains 800 mg DHA and 400 mg EPA. That dose for most of our readers is completely sufficient.
Squid are not exotic. There is nothing mysterious or magical about them. Since omega-3's are omega-3's, whether they come from salmon, mussels, krill, or squid, many marketing schemes use mysterious hype to differentiate their products. It's really not that complicated. Find a good source of DHA or EPA at a reasonable cost per dose, and be sure that in using it you're a responsible planetary citizen. You'll get benefit from all three options here. One is sustainable, but costs a lot of money. One is costly to the overall stability of the marine ecosystem. One is sustainable and economical. We think it sells itself.
Besides, now you have an extra reason to order that really tasty calamari appetizer at your favorite Italian restaurant.
Ulven SM, Kirkhus B, Lamglait A, Basu S, Elind E, Haider T, Berge K, Vik H, Pedersen JI. Metabolic effects of krill oil are essentially similar to those of fish oil but at lower dose of EPA and DHA, in healthy volunteers. Lipids. 2011 Jan;46(1):37-46. Epub 2010 Nov 2.