Linear dose response relationship between supplemental Zn sources and pancreas Zn content. Relative Zn bioavailability for ZnSO4 is 100%, for zinc glycinate (ZnGly) is 118%, and for zinc pectin oligosaccharides (ZnPOS) is 142%. y = 83.465 + 0.038 × x1 + 0.045 × x2+ 0.054 × x3 (R2 = 0.501). The SE were 11.127, 6.925, and 4.833 for x1, x2, and x3, respectively. Values on the x-axis are based on added values for Zn in the diets.