Take a nice deep breath in… through your nose. It’s a simple way to get healthier gums, a better memory, and improved lung function. How? Well, it may partly be due to a special molecule called nitric oxide. Michael Mosley speaks to Professor Jon Lundberg from the Karolinska Institute in Sweden who made the fascinating discovery that nitric oxide is produced in your nose and travels to your lungs where it has some surprising benefits, including boosting oxygen uptake and possibly helping you fight off infections. Our volunteer Joe tries out a few tips to make nasal breathing a habit.New episodes will be released on Wednesdays, but if you’re in the UK, listen to new episodes, a week early, first on BBC Sounds: bbc.in/3zqa6BBProducer: Nija Dalal-Small Science Producer: Catherine Wyler Assistant Producer: Gulnar Mimaroglu Trainee Assistant Producer: Toni Arenyeka Executive Producer: Zoe Heron A BBC Studios production for BBC Sounds / BBC Radio 4.

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