DUBLIN, Ireland -- A doctor based in Dublin, Ireland, has debunked the idea that a face mask lowers oxygen levels. In fact, he's shown that even wearing several has no effect.This video shows Maitiu O Tuathail putting six masks on his face while recording his blood oxygen saturation levels.As he puts on mask after mask,…
DUBLIN, Ireland -- A doctor based in Dublin, Ireland, has debunked the idea that a face mask lowers oxygen levels. In fact, he's shown that even wearing several has no effect.This video shows Maitiu O Tuathail putting six masks on his face while recording his blood oxygen saturation levels.As he puts on mask after mask,…
6 min read THE BODY IS a complex machine. Your corporeal form houses over 600 muscles, all working together to help you perform your best every day. Fitness pros tend to organize all of these into different muscle groups—think upper body, lower body, core, and legs. If you're training to improve your physique, it may
Graphical abstract. Credit: Biomolecules and Biomedicine (2025). DOI: 10.17305/bb.2025.12331 Researchers report in a study, published in Biomolecules and Biomedicine, that lower blood levels of vitamin D are consistently linked with higher rates of depression in adults—especially when 25-hydroxy-vitamin D [25(OH)D] falls at or below 30 nmol/L. The authors emphasize that this does not prove cause:
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