What is the "third" drug in this combo, the article says: ".. growth hormone and two diabetes medications". So far only the DHEA and Metformin has been discussed and I have no access to the source article.. any takes?

edit-1: the answer is that the nature.com article got it wrong and other net sources parroted that article, https://www.leafscience.org/study-results-suggest-human-agin... is more accurate overview: there is no third drug involved.

edit-2: scratch edit-1, HGH was obviously the primary growth hormone given and for some reason DHEA was counted as an anti-diabetic rather than a hormone (it is both) together with Metformin. Now I would just like to know the dosages involved!