Astaxanthin | GNC
Vegan Vegan
Vegetarian Vegetarian

ZanthoSyn® Astaxanthin


Item # 539600
Vegan Vegan
Vegetarian Vegetarian

Product Information



ZanthoSyn® - safe anti-inflammatory for health and longevity.* ZanthoSyn® is a pure and highly absorbed form of astaxanthin recommended by doctors.


  • ZanthoSyn® is a clinically studied ingredient with safe anti-inflammatory activity that supports: joint health*, liver health*,  cardiovascular health*, and metabolic health.*
  • Physician Endorsed
  • Vegan Friendly, Non-GMO.


Nutrition Facts
Serving Size  1 Capsule(s)
Servings Per Container  60

Amount Per Serving     % DV

Astaxanthin  12 mg   **

** Daily Value (DV) not established.
Other Ingredients
Modified Food Starch, Tapioca (Capsule), Microcrystalline cellulose, Corn Starch, Glucose Syrup, Sodium Ascorbate, DL-Alpha-Tocopherol
Label (click image to enlarge)

How To Use

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
Distributed by: Cardax, Inc.
Honolulu, HI 96822


4.9 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great product
Great product. Works for me! My knee doesn't feel so bad and I don't have to take Advil daily.
July 10, 2019
1 month ago
Great product, I recommend it to all my patients
I am a preventive cardiologist and internist and love this product. I recommend it to all my patients. It targets inflammation and one patient with Rheumatoid Arthritis was able to dress herself for the first time in a year. Always hard to prove causation, but I think the Zanthosyn certainly helped.
June 18, 2019
Fantastic product, have been taking for about a year!
May 25, 2019
2 months ago
Overall slightly less achey and less irritation. Glad I tried it and will continue to use it.
March 31, 2019
4 months ago
Great supplement!
I love it! Im starting to feel better each day and my daily ‘movement’ seems to be better. I highly recommend this product.
March 16, 2019
4 months ago
ZanthoSyn will become one of the most important products on your shelf
Great product! Going to by more!
March 13, 2019
5 months ago
Supplement to promote health
Wonderful product that is easy to take and can be found at the GNC stores in Hawaii. ZanthoSyn has helped with my aches after exercise. I am looking forward to seeing the effects on my heart health.
January 11, 2019
7 months ago
I am in the trial stages. I am using this as an anti-inflammation product.
January 1, 2019
7 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 5 questions Browse 5 questions and 8 answers
what's the difference between the natural and synthetic form of astaxanthin?
A shopper on Jan 7, 2019
Is this natural from H. pluvialis. or synthetic. Any petrol chems?
A shopper on Feb 20, 2019
Is it safe to use with neoral?
A shopper on Feb 11, 2019
How many Capsules do you take a day?
Mike G on Feb 6, 2019
BEST ANSWER: 2/day. 1 AM during breakfast or right after eating and 1 PM dinnertime.
how many mg. in the Astaxanthin?
Patricia C on May 6, 2019
BEST ANSWER: 12mg Astaxanthin each capsule. I always buy the 90 capsule bottle.