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Extremely high or extremely low levels of oxidized glutathione results in less than optimal activation of these transcription factors making it important for optimal levels of intracellular oxidized glutathione to be maintained throughout the cell[19, 20]

You can also add stabilizing co-solutes (e.g., a bit of glycerol or sucrose) if aggregation is an issue

O 2 is the main initial product of ROS, typically produced from electron leakage in the mitochondrial respiratory chain and stored in the mitochondria during cellular diffusion [42,43,44]

Everybody has different metabolism and body weight

Thats a far bigger concern than many people realise. Unlike licensed medicines, products sold through unregulated online suppliers may vary significantly in purity, concentration and quality