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Swanson GreenFoods Formulas

Ecklonia Cava Extract

Item | SWR053

  • Strong antioxidant support from algae

  • 99.9% pure—the purest extract available

Serving Information

  • Serving Size: 1 capsule
  • 30 Servings Per Container
  • Veg Caps Size: 1
20% OFF
30 Veg Caps

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Supplement Facts

Serving Size 1 Veggie Capsule

Amount Per Serving   % Daily Value
Ecklonia cava 80:1 Extract (water extraction, 99.9% pure Ecklonia cava) (frond and stipe) [standardized to 50% polyphenols (Including phlorotannins)] 53 mg *

*Daily Value not established.

Other ingredients: Microcrystalline cellulose (plant fiber), hypromellose (vegetable capsule), rice extract blend, silica.

Suggested Use: As a dietary supplement, take one veggie capsule per day with food and water.


by our team of internal scientific & wellness experts


for unsurpased purity, potency safety & quality by internal & third-party labs


by Swanson Health's expert standards for quality products for mind, body & home

Quality Code Approved
  • Strong antioxidant support from algae

  • 99.9% pure—the purest extract available

Ecklonia Cava Extract from Swanson GreenFoods Formulas is produced from a type of brown algae grown off the coast of Korea and Japan. It features a unique form of polyphenols called phlorotannins that are chemically distinct from all land/plant based polyphenols. Ecklonia Cava is the star of this class of algae-based antioxidants, and it may offer stronger antioxidant benefits than land-based sources like green tea or resveratrol (potentially up to 2 or 3 times the strength). Plus, Swanson 99.9% pure Ecklonia Cava is the purest, water-based extract you can buy.

Terms and Ingredient Definitions

Shipping Weight: .06 lbs


These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Disclaimer: Product reviews are provided for informational purposes only. The information or opinions expressed therein are solely those of the contributors and do not necessarily represent those of Swanson Health Products and its employees. Please read full product reviews disclaimer.
1-5 of 45 reviews
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Not as good as previous formula
It’s better than not having it but not as good as the original product of this. That has been gone for quite awhile and when they said they upgraded it, well this is a downgrade to me. The original formula was so much better but still this is better than nothing.
Quality: 4.0 / 5.0
Value: 3.0 / 5.0
Effectiveness: 3.0 / 5.0
Convenience: 5.0 / 5.0
Satisfaction: 3.0 / 5.0
This supplement took me and my doctor by surprise. I was not expecting the benefits I gained when I started taking this. I WISH you still offered the larger packaging and better pricing, but my doctor has ordered me to never stop taking this, and based on my individual benefit from adding it to my daily routine, I never will.....
Quality: 5.0 / 5.0
Value: 5.0 / 5.0
Effectiveness: 5.0 / 5.0
Convenience: 5.0 / 5.0
Satisfaction: 5.0 / 5.0
Less effective ecklonia cava
Swanson's used to carry a non extract form of this brown seaweed which had a much more than 53 mg. Not sure why they dropped it but I found it not only cheaper but much more effective. I wish they would return to that. This mg amount is very small and incomparable to other effective brands.
Ecklonia Cava
I really liked this product. I slept as well as I have in years when I started taking it and it was a great mood stabilizer at least for me.
Quality: 5.0 / 5.0
Value: 5.0 / 5.0
Effectiveness: 5.0 / 5.0
Convenience: 5.0 / 5.0
Satisfaction: 5.0 / 5.0
What I really want, and have been looking for, is authentic Brown Seaweed in food form. I have read so many astounding things about the people in Okinawa, Korea, and Japan who enjoy awesome health, wellness, and fitness into advance ages, and the many articles I've read attribute this to their diet with high percentages of Brown Seaweed. We all see articles every day about this and that food that is supposed to be good for us, and some even super good for us. It always sounds good. Maybe too good to be true. Kind of makes us want to eat those foods to be good to ourselves. Well, I want to add Brown Seaweed to my diet if I can find it, and if it is palatable. I'd like to experience it for myself. Brown Seaweed is available in pill form under a number of different names, and one of those is Ecklonia Cava. So I thought I'd try Ecklonia Cava. I ordered it from Swanson, because as usual Swanson has the best price.. I was dubious about the apparently small 53mg. potency. And apparently my doubts are confirmed. I have noticed none of the wonderfulness I have read about. So, I'm still interested in trying Brown Seaweed as a food, but I can't recommend this 30 capsule size bottle of 53mg. Ecklonia Cava capsules. I tried taking 1, 2, and even 3 capsules a day in my quest for Brown Seaweed 'wonderfulness.' Nothing going on. I won't be buying this product again.
Quality: 3.0 / 5.0
Value: 3.0 / 5.0
Effectiveness: 3.0 / 5.0
Convenience: 3.0 / 5.0
Satisfaction: 3.0 / 5.0

Q: Why does the color and smell seem to be different than my last order?

A: Natural color variations can occur from batch to batch. Botanical ingredients have a distinct and earthy odor noticeable after opening the bottle.

Swanson Health started in 1969 in Fargo, ND with a mission to offer pure and potent health products at a great value. Over 50 years later, we continue to innovate science-backed vitamins and supplements, delivering wellness solutions that help people live simply healthier together, and find vitality at any age. Click here to learn more about us.

For over 50 years, Swanson Health's research and development team has delivered science-backed health and wellness products to people around the world. Our innovation is guided by clinical research, scientific consensus, emerging research and usage traditions, creating products that help you find vitality at any age. At Swanson, we don't hide our science behind proprietary formulas — we believe in easy-to-read, transparent labelling. What's printed on our labels, is exactly what you'll find in our products.

Swanson Health's purity and potency testing begins with our ingredient sourcing, continues through manufacturing, and goes beyond when a product hits the shelf. Our testing exceeds industry standards, ensuring each product meets our quality guarantees for purity and potency. Swanson facilities are Good Manufacturing Practices (GMP) certified, and we voluntarily participate in third-party, independent laboratory testing. With Swanson, you can be sure you're getting the most pure and potent health products at a great value. Click here to learn more about our quality standards.


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