Download the Nature Podcast 19 November 2025
In this episode:
00:45 A molecule that delivers insulin through the skin
Researchers have developed a skin-permeable polymer that can deliver insulin into the body, which they say could one day offer an alternative to injections for diabetes management. The skin’s structure presents a formidable barrier to the delivery of large drugs but in this work a team show that their polymer can penetrate though the different layers without causing damage. Insulin attached to this polymer was able to reduce blood glucose levels in animal models for diabetes at a comparable speed to injected insulin. While further research is required on the long-term safety of this strategy, the team hope it could offer a way to non-invasively deliver other large-molecule drugs into the body.
Research Article: Wei et al.
09:23 Research Highlights
How extreme drought may be humanity’s biggest challenge after a huge volcanic eruption — plus, turning a bacterium into a factory for a colour-changing pigment
Research Highlight: Volcano mega-eruptions lead to parched times
Research Highlight: Dye or die: bacterium forced to make pigment to stay alive
11:42 How language lights up the brain, whatever the tongue
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