Ester-C®, the patented form of Vitamin C, provides 24-hour immune support, is non-acidic, and contains naturally-occurring metabolites for quick absorption.* And, since it is supported by science, you know you are giving your body the advanced immune support it shouldn’t be without.* Powerful immune support* – A recent clinical study shows that Ester-C® increases vitamin C levels in your body for up to 24 hours.* Now that’s powerful immune support you shouldn’t be without! Naturally-occurring metabolites for quick absorption * – The metabolites in Ester-C® activate the vitamin C molecules making it easier for them to be absorbed by the body. Ester-C® is quickly absorbed and provides advanced immune support.* Gentle On Your Stomach* – Ester-C® is non-acidic, making it gentle on your digestive system. So now, even people with sensitive stomachs can take advantage of the powerful, extended support of Ester-C®.