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Tablets & Capsules July/August 2021 9 An adequate daily calcium intake is essential for strong bones and teeth as well as properly functioning muscles and nerves. In addition to eating calcium-rich foods, consumers can support their daily intake with calcium supplements, pharmaceuticals, and fortified foods. How- ever, ingesting the mineral in any form is not enough; to ensure proper absorption, the form of calcium needs to be adequately bioavailable and bioaccessible. Bioac- cessibility is the amount of an ingested nutrient that is potentially available for absorption. In the case of cal- cium salts, the dissolved proportion in the gastric acid determines the bioaccessibility. Characterization of the samples In this study, researchers determined the bioaccessibil- ity and bioavailability of Omyaforte 100—a functionalized calcium carbonate (FCC)—and compared it with other frequently used calcium sources: calcium citrate tetrahy- drate (CCT), tricalcium phosphate (tri-CP), and calcium carbonate (CC). The calcium powders were character- ized by measuring particle size, distribution, and porosity. Although CC and FCC showed the smallest particle sizes, significant differences were observed between the two. © 2021 Donaldson Company, Inc. Donaldson.com 800.365.1331 P031984-016-210 Spunbond polyester pleated bags with Ultra-Web ® fine fiber technology provide significantly longer filter life, energy savings due to lower pressure drop, reduced maintenance downtime and lower emissions. This filter is just one of over 100,000 replacement filters and parts Donaldson has in-stock and ready to ship today. Not tomorrow. Today. Find this filter and thousands more at shop.donaldson.com Figure 1 Scanning electron microscopy (SEM) analyses representative of the studied calcium salts. CCT (A and B); tri-CP (C and D); CC (E and F); and FCC (G and H). x1,000 x10,000