Correction to: Nature Metabolism https://doi.org/10.1038/s42255-020-0260-3, published online 3 August 2020.

In the version of this article initially published, in Fig. 1, ‘Spermidine → Spermidine’ should have read ‘Spermidine → Spermine’. The error has been corrected in the HTML and PDF versions of the article.