glutathione peroxidase deficiency symptoms The role of peroxidase-1 in health and disease Frontiers | Research progress of

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Ferdousi M, Azmi S, Petropoulos Ioannis N, Fadavi H et al (2015) Corneal confocal microscopy detects small fibre neuropathy in patients with upper gastrointestinal cancer and nerve regeneration in chemotherapy induced peripheral neuropathy

2018 Nature Communications paper (NR reduced blood pressure and arterial stiffness in healthy middle-aged adults), and numerous pharmacokinetic studies Animal lifespan data: While NAD+ precursors have shown healthspan improvements in mice (improved physical activity, insulin sensitivity, mitochondrial function), clear lifespan extension data is more limited and inconsistent DNA repair: Studies demonstrated restored PARP-dependent DNA repair in aged mice and radiation-exposed human cells following NAD+ repletion Stem cell rejuvenation: NMN restored aged muscle stem cell function and improved hematopoietic stem cell parameters in mice Epidemiological data: NAD+ levels correlate with biological age across multiple cohort studies, establishing translational relevance Key limitations: Despite abundant evidence for NAD+ restoration, the downstream clinical benefits in humans are still being established