Can glutathione impact mitochondrial health?
Mitochondria is a cellular organelle often referred to the "powerhouse" of the cell, regulating a range of functions from energy generation, metabolism and cell survival. Supporting mitochondrial function is the wellspring of efforts to promote physical fitness and longevity at the cellular level. Glutathione plays an important role in the theory of aging that cumulative oxidative stress in mitochondria may determine lifespan. Glutathione helps stabilize the inner mitochondrial membrane, neutralizes reactive oxygen species (ROS) generated by mitochondrial respiration, and maintains mitochondrial DNA fidelity to influence mitochondrial function and cell survival.2,15,16
What is the role of glutathione in the aging process?
Glutathione levels are believed to rapidly decline after the age of 45. The body has to contend with increased oxidative stress, weakening immunity, and more DNA repair demands as we age. Randomized clinical studies in rodents and older adults show that glutathione acts in concert with the independent actions of two key precursors, glycine and cysteine, to support favorable changes in an array of biomarkers associated with the hallmarks of aging. Biomarkers for endothelial function, insulin sensitivity, intracellular signaling, maintaining DNA integrity, inflammation, metabolic flexibility, mitophagy (recycling old and damaged mitochondria), and cellular senescence (also called "zombie cells" as these cells have lost proper function, harm nearby cells, and do not die off) are all favorably affected. Most of these biomarkers are modulated by glutathione and its precursors at the mitochondrial level. The biomarker changes were shown to correspond with endpoints such as favorable changes in gait and body composition.15,16