Figure 2 Pharmacokinetic action profiles of rapid-acting insulins Figure 2 | Pharmacokinetic action profiles of rapid-acting insulins. The schematic shows the pharmacokinetic action profiles of rapid-acting insulins7,102. Compared with human regular insulin, insulin aspart, insulin lispro and insulin glulisine have a faster onset of action, a higher peak level and a shorter duration of action. Compared with the other rapid-acting insulin analogues, the curve for rapid-acting insulin aspart is shifted to the left, with a similar area under the curve, but a faster onset and earlier peak. Care must be taken when interpreting the curves, as experimental settings in which the data were gathered differed between studies. IU, international units. Mathieu, C. et al. (2017) Insulin analogues in type 1 diabetes mellitus: getting better all the time Nat. Rev. Endocrinol. doi:10.1038/nrendo.2017.39