“Compared to other established lifespan-extending interventions, Oxytocin+A5i demonstrates unique outcomes, such as significantly (over 70 per cent) increased life expectancy from the start of this therapy in old and frail male mice, and a robust decrease in mortality risk,” they wrote.

The latest study also found that the Oxytocin+A5i treatment reduced chaotic levels of some circulating blood proteins, which are key markers of ageing, bringing their levels back to a more youthful state.

However, after four months of continuous treatment, only male mice showed sustained improvement in these protein levels.