Ester-C® is a unique and patented form of Calcium Ascorbate-Threonate. It is made using a proprietary manufacturing process which results in a pH neutral product that contains naturally occurring vitamin C. The main benefits of Ester-C® are its quick absorption and 24-hour retention in the immune system.

Ester-C® is approved by EFSA in Annex II and therefore allowed in Europe for use in food supplements. EFSA Health Claims for Vitamin C can be used for Ester-C® alongside the benefits and advantages of this patented product.


Ester-C® is available in granular, fine, effervescent and chewable grade and it is also suitable for animal feed applications. Contact us for more information our visit our dedicated page.