Isotonix® Vitamin C

$15.95 USD - $34.50 USD

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The two most important factors when searching for the best quality nutritional supplements are absorption and potency. Isotonix supplements, when mixed with water, have the same pH and osmotic pressure as the body's fluids, such as tears, plasma and blood. In order for meaningful absorption of nutritional content to take place, all food must be converted into an isotonic state. This process could take up to three hours. This time consuming process limits the amount of nutrients absorbed by the body. However, our Isotonix Vitamin C sets itself apart from other products on the market providing you with the maximum absorption of the nutrients within the product in the shortest amount of time. All in all, Isotonix Vitamin C provides superior delivery of the nutrients your body needs in the most cost effective way. According to researchers at the University of Leeds, Guys Hospital in London, Baylor University and the Mayo Clinic, among others, have shown that not only do isotonic solutions leave the stomach faster, but also that the osmotic pressure of the stomach contents is one of the controlling mechanisms for the rate at which the stomach empties leading to more efficient assimilation by all of the body's systems. The liquid composition of Isotonix Vitamin C Formula places the vitamins and minerals in an optimal position for absorption and superior delivery to the body's systems. Isotonix Vitamin C is an exemplary product that leaves you with peace of mind, knowing that you are doing the most and the best for your health.*

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


Customer Reviews
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Displaying reviews  1 - 5 of 49


Great Taste

This product tastes great and delivers all the Vitamin C needed for the day !

Response from Customer Service:
December 10, 2019

Dear Valued Customer,

Thank you for taking the time to leave your thoughts on the Isotonix Vitamin C. We are happy to hear you are pleased with the product.

Thank you again!
The Product Information Team



Love this vitamin c supplement much


Product review

Great stuff


Great Taste, Effective & the kids Love it

There is nothing not to like about this product. It taste great, very effective and great as a gift to others.


  • Shop Consultant

Awesome Product

We love the Isotonix Line! Unfortunately, we have not received 2 of our last 4 shipments of Vitamin C. Product awesome - Shipping very problematic.

Response from Customer Service:
May 8, 2019

Dear Valued Customer,

Thank you for contacting Market America| We do apologize that there was an issue with delivering your prior orders. It seems you are already in contact with one of our team members to get the matter to resolve.

We understand the process can be frustrating, but rest assured we are urgently working for your satisfaction. Your patience is very much appreciated.

If you would like to call us directly, please feel free to contact us at 1-866-420-1709 Monday-Friday between the hours of 9:00 a.m.-9:00 p.m. EST.