There is an ideal oxygen percentage in air for long-term health
Evidence indicates that deviations from normal physiological oxygen levels, particularly hyperoxia, lead to increased oxidative stress and cellular damage, supporting the concept of an optimal oxygen range.
The retrieved literature (such as studies on oxygen concentration-dependent oxidative stress and physiological cell culture conditions) demonstrates that both hypoxia and hyperoxia induce physiological changes and stress, supporting the premise that specific oxygen ranges are optimal for cellular health.
Fumiko Nagatomo, Hidemi Fujino, Hiroyo Kondo, Akihiko Ishihara. Oxygen Concentration-Dependent Oxidative Stress Levels in Rats. 2012. https://doi.org/10.1155/2012/381763
Demonstrates that oxygen concentrations above 40% induce excessive oxidative stress and red blood cell damage in rats, pointing to physiological limits.
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Tamara Džinić, Norbert A. Dencher. Oxygen Concentration and Oxidative Stress Modulate the Influence of Alzheimer’s Disease A<i>β</i><sub>1–42</sub> Peptide on Human Cells. 2018. https://doi.org/10.1155/2018/7567959
Shows that physiological cell cultivation at lower oxygen concentrations (5% O2) rather than standard high levels (21% O2) alters cellular stress responses, highlighting the importance of oxygen levels.
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