Liquid Iron and Vitamin C Supplement. Less side effects (By consuming pur-Absorb, side effects are less likely because of the gentle dose.). One packet a day provides the absorbable iron you need (The US RDI for iron is based on 18% bioavailability of ingested iron. Because pur-Absorb has been clinically shown to be absorbed at a 40% rate, less supplemental iron is needed to fulfill the daily iron needs.). Clinically shown high absorption rate. 14 one-a-day packs. Plus vitamin C for enhanced absorption. You've been told you need more iron. With pur-Absorb, less is more. Typical Iron Supplements: 65 mg iron per dose; 2 mg iron needed; 63 mg excess iron; pur-Absorb: 5 mg iron per dose; 2 mg iron needed; 3 mg excess. With a clinically shown high absorption rate, one dose of pur-Absorb naturally provides the absorbable iron you need (The US RDI for iron is based on 18% bioavailability of ingested iron. Because pur-Absorb has been clinically shown to be absorbed at a 40% rate, less supplemental iron is needed to fulfill the daily iron needs.). And with a gentle dose side effects are less likely. Too much iron can cause constipation and other uncomfortable side effects. Questions? 1-800-319-9151. Website: purAbsorb.com. Gluten free, Kosher and suitable for vegetarians. pur-Absorb contains naturally occurring iron rich water collected from a spring in Snowdonia, North Wales UK. A better way to take iron. Product of the UK.