24-Hour Immune Support

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. No other vitamin C can make this claim!

Advanced Immune Protection

Ester-C’s unique chemical composition promotes absorption and delayed excretion of vitamin C, as demonstrated by a laboratory study that found that Ester-C can increase the levels of vitamin C within immune cells.² Its powerful immune support has also been demonstrated clinically. In the 60 day study - “Preventing the Common Cold with a Vitamin C Supplement” - 168 healthy participants who took 500 mg of Ester-C twice per day, reported feeling healthier as compared to a placebo group. Additionally, the subjects who took Ester-C reported 77% fewer seasonal issues as compared to the previous winter.³

Non-Acidic and Gentle on the Stomach

In a recently published study, individuals sensitive to acidic foods were given 1 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.⁴ So for anyone who has difficulty tolerating vitamin C, it is comforting to know that Ester-C has been clinically shown to be non-acidic and gentle on the stomach.

References

1. Bernal, S. et al. Vitamin C uptake in White Blood Cells in Vivo. 2006.
2. Fay, M.J. et al. 1991. Stimulatory action of calcium L-threonate on ascorbic acid uptake by a human T-lymphoma cell line. Life Science 49:1377-81.
3. 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.
4. 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.