SPECIAL STORY FEED & ADDITIVE MAGAZINE September 2023 61 trol diet (containing 23 ppm of native Zn) and Zn supplemented at 6 or 12 ppm, either from ZnSO4, a potentiated source of ZnO (Hizox®, Animine, France), or 3 ZnO sources. In the last day, the right tibia of birds was collected to assess the relative bioavailability of bone Zn (Figure 1). The experiment demonstrated that sources with a quick dissolution kinetic in acidic condition like gastric pH (similar to the ZnSO4 ones), have similar bioavailability to the sulfate reference (ZnO 1 and 2). In the opposite, ZnO sources with an inert dissolution kinetic showed the lowest bioavailability values (ZnO 3). Finally, in between, the study demonstrated the specific properties of HiZox®: a source with small aggregates and agglomerated particles. Hizox® showed the highest bioavailability, compared not only to the other ZnO sources, but also to ZnSO4. The bioavailability of HiZox®, which proved to be superior to the ZnSO4, can be considered at least the same as the best chelates in the market. Two recent trials performed by Animine compared the concentration of Zn in bone (the best biomarker of the zinc bioavailability in farm animals) from broilers fed HiZox® versus other chelated sources. The first trial compared HiZox® to a methionine hydroxy analog (MHA) source of Zn in European conditions. Levels tested were 70 or 35 ppm of Zn. Native Zn concentration was 34 mg/kg and the animals were slaughtered at 35d (Figure 2, Trial 1). The second trial compared HiZox® to an amino acid source of Zn in North American conditions. Levels tested were according to genetic lines recommendation (100 ppm of Zn). Native Zn concentration was 29 mg/kg and the animals were slaughtered at 28d. Figure 1. Relative biological values of different sources of ZnO compared to ZnSO4, considered to have a 100% of bioavailability (P < 0.05). High Concentration Flowability Safety standards Stability Bioavailability Animal performance POTENTIATED ZINC MONOVALENT COPPER PURIFIED MANGANESE an international and independent supplier of precision minerals , www.animine.eu UNIQUE BLENDS
RkJQdWJsaXNoZXIy MTUxNjkxNQ==