High absorption-inflow into the bloodstream in large quantities and faster ester-c veg.caps 500mg / high absorption, buffered vitamin c complex with integrated: bioflavonoid citrate complex, acerola, rosehip berries, rutin and the naturally occurring metabolites of vitamin c: l-threonic, l-lyxonic and l-xylonic acid. ester-c is absorbed about four times longer, activates twice as fast, and stays in circulation twice as long as regular vit. c. in capsules or tablets.