(Cell Metabolism 34, 408–423.e1–e8; March 1, 2022) We regret that a mistake was made in the conversion of dietary selenium supplementation from ppm to molar concentration (see page 9 and Figure 5 legend). The selenium was delivered at a concentration of 10 ppm, which equates to 50 μM, not 50 nM as reported. This mistake does not affect either the results or the conclusions of the paper. The authors apologize for the error and any confusion it may have caused.