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In the intensive care unit, the level of 3-bromotyrosine in airways of severe asthma patients was 100-fold higher than that in individuals hospitalized for nonasthma causes [32]

Downstream IGF-1 Once GH is released, the liver converts most of it into IGF-1

Acknowledgements This work was supported by the Austrian Science Fund (10.55776/COE16, T.H.), the Swedish Research Council (2023-03058, T.H.), the Swedish Brain Foundation (FO2022-0300, T.H.), the Novo Nordisk Foundation (NNF23OC0084476, T.H.) and the European Research Council (ERC-2020-AdG-101021016

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By the time many adults reach midlife, the same pattern shows up: workouts that once produced results deliver less, abdominal fat resists diet and cardio, and recovery from training stretches from hours into days