What is Ester-C®?

Ester-C® Calcium Ascorbate is a unique and patented form of vitamin C. It is made using a proprietary, water-based manufacturing process which results in a pH neutral product that contains naturally occurring vitamin C metabolites. These metabolites activate the vitamin C molecules making it easier for the body to transport them from cell to cell for numerous health benefits.*

• 24-Hour Immune Protection*
A recent clinical study showed that Ester-C® increased vitamin C levels in the body for up to 24 hours.¹ White blood cell levels of Vitamin C were elevated in subjects receiving Ester-C® when measured 24 hours after initial dose. The presence of key metabolites such as threonate has been shown to be responsible for this increased level and retention of Vitamin C by the cells.

• Advanced Immune Protection
Its powerful immune support has also been demonstrated clinically. In a 60 day study of 168 participants, 84 subjects were given Ester-C and 84 subjects were given a placebo. At the end of the study, subjects receiving Ester-C had significantly fewer reports of decreased well-being and immune system health compared to the placebo group.²

• Non-Acidic and Gentle on the Stomach
In a recently published study, individuals sensitive to acidic foods were given one gram of vitamin C as ascorbic acid or as Ester-C®. Subjects reported heartburn “significantly more frequent and severe after intake of ascorbic acid” and subjects rated Ester-C® as tolerated “very good” significantly more than ascorbic acid.³ So for anyone who has difficulty tolerating vitamin C, it's comforting to know that Ester-C® is non-acidic and gentle on the stomach.

How can Ester-C® help me?

The main benefit of Ester-C® is its quick absorption and 24-hour retention in the immune system.*

This unique ingredient:

1. remains active in the white blood cells for up to 24 hours*
2. offers powerful, highly advanced immune support*
3. is non-acidic, so it’s gentle on the digestive tract
4. contains naturally-occurring metabolites for quick absorption and maximum retention
5. is so unique it’s patented
6. is backed by science
   
   

References

1. Combs MA, Vrablic AS, Moyad MA, Bernal S, Velasquez J, Supangan B. Vitamin C Metabolites Enhance Leukocyte Uptake And Half Life: Critical Implications For Immune Enhancement? 48th Annual Meeting of the American College of Nutrition. 2007.
   
2. Van Straten, M et al. 2002. Preventing the common cold with a vitamin C supplement: a double-blind,
   placebo-controlled survey. Adv Ther 19(3): May-Jun: 151-9. [Author notes that 2 of the 168 participants dropped out for personal reasons.]
3. Gruenwald, J. et al. 2006. Safety and Tolerance of Ester-C® compared with regular ascorbic acid. Advances in Therapy. 23(1): Jan-Feb: 171-8.