ZanthoSyn™ Astaxanthin | GNC

Cardax ZanthoSyn™ Astaxanthin


Item # 539600


Size: 60 Capsules

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Product Information


Safe Anti-Inflammatory for General Health*
Astaxanthin Supplement

ZanthoSyn™ is a pure and highly absorbed form of astaxanthin recommended by healthcare professionals.
Astaxanthin is a clinically studied ingredient with safe anti-inflammatory activity that supports:
  • Joint Health*
  • Liver Health*
  • Cardiovascular Health*
  • Metabolic Health*

Label (click image to enlarge)


As a dietary supplement, take 1 capsule daily with food or as directed by a healthcare professional.


Do not use if safety seal is broken or missing. Consult your physician before use if you are pregnant, nursing, taking medication, or have a medical condition. Store in a cool, dry place

Other Ingredients

Modified Food Starch, Tapioca (Capsule), Microcrystalline cellulose, Corn Starch, Glucose Syrup, Sodium Ascorbate, DL-Alpha-Tocopherol
Distributed by: Cardax, Inc.
Honolulu, HI 96822

Nutrition Facts

Serving Size  1 Capsule(s)
Servings Per Container  60

Amount Per Serving     % DV

Astaxanthin  12 mg   **

** Daily Value (DV) not established.


4.6 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
A must try!
Helped with my joint swelling in hands and feet. Results in a week. I recommend this highly.
March 21, 2018
1 month ago
A wonderful product
Fantastic! Will continue to use this product...
March 17, 2018
1 month ago
It's only 2 weeks that I have been taking ZanthoSyn so I will be back.
January 20, 2018
3 months ago
I have an arthritic knee with no ACL. I take two capsules daily with breakfast. If I stop taking the pills, after three days I feel like the “Tin-Man” in the Wizard of Oz...this stuff works and allows me to recover quicker from weightlifting workouts.
January 1, 2018
Great product with great results
October 10, 2017
7 months ago
Best anti-inflamatory product on market
Everything I've read shows this product is the best for any active person. I'm 58yrs old and still play 4 full-court games of basketball once a week. My sprains rarely occur and my healing time is generally little over 2 weeks (I used to get sprains about 6 times a year and it would normally have taken about 6 weeks for me to get back on the court). Used to take advil or other ibprophens, all caution against side affects. Zanthosyn studies have shown no side affects and much higher doses than what I'm taking (only one per day, but thinking of upping to 2/day ). Nature identical properties prepared synthetically seems to make more sense than the natural product so it's always consistent. I also understand it is 2.8 times more absorbtion of the active ingredient, asthazanthin, into your system than the natural product.
September 20, 2017
Very promising.
I just had total knee replacement 2 weeks ago. I was walking unassisted in 7 days, most inflammation gone at 2 weeks. Rarely use walker at home. Taking two caps, 12mg, three times Per day. PT is amazed at my progress. No side effects.
August 30, 2017
Great product has many benefits
This is a great product for inflammation & reasonably priced compared to others with similar benefits. This also has additional benefits (see the original company info - Cardax).
July 25, 2017
9 months ago
Phenomenal Results
Highly recommend this product. I have been using Astaxanthin for years due to tendinitis from working out. This synthetic Astaxanthin is more potent and has a much longer half life then the traditional Astaxanthin. For first time users of any Astaxanthin supplements, you need to give it several months before you can expect to see the true benefits. I would no longer be able to exercise without using this product. I feel 100% better by using this product. I take two capsules daily with food. I believe you get even better results taking this with fish oil supplements.
July 9, 2017
Outstanding results with Zanthosyn
4 months ago, my triglyceride reading was a whopping 756 and began using this after hearing of their promising antiaging research results. My recent TRIG reading was 73! HDL reached a new high and LDL a new low as well. I also notice rapid recovery and less injuries from my CrossFit training since using Zanthosyn. Highly recommended via proven lab results for conditions it mentions as well as general physical health!!
July 5, 2017
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Is this like Bioastin?
Karen L on Mar 28, 2018
BEST ANSWER: Yes, they have the same active ingredient listed. I have been taking ZanthoSyn since Nov 2017 and it has greatly improved my sore neck and upper back. Please note that it took about two weeks of taking one capsule every day to feel relief. One of my friends had to take four per day for one week to experience the same effect. But now he only takes one capsule every other day. Good luck! And I hope you feel better real soon!
Would this be good for back problems?
A shopper on Apr 8, 2018
BEST ANSWER: I take it for my knee pain and it has relieve the pain.