Correction to: Nature Metabolism https://doi.org/10.1038/s42255-019-0101-4, published online 19 August 2019.

In the version of this article initially published, the percentages in the x and y axes in Fig. 6b read 93% and 5%, respectively, but should have read 72.5% and 11.0%, respectively. The errors have been corrected in the HTML and PDF versions of the article.