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. Author manuscript; available in PMC: 2022 Nov 1.
Published in final edited form as: Metabolism. 2021 Sep 1;124:154870. doi: 10.1016/j.metabol.2021.154870

Figure 1.

Figure 1

Abrupt loss of glucose-stimulated first phase insulin release (FPIR) with increasing fasting plasma glucose levels. Data are taken from the study of Brunzell et al (15). When glucose levels increased to the range of 100–114 mg/dl, FPIR is reduced to 40% of normal and with further increases in fasting glucose FPIR was absent.