slc25a39 is necessary for mitochondrial glutathione import in mammalian cells Autoregulatory control of homeostasis SLC25A39 identified as a key

Respiratory Issues and Shortness of Breath: NAC acts as a powerful mucolytic, helping to thin and break down thick mucus in the lungs, which can improve oxygen exchange and alleviate the persistent shortness of breath often seen in Long COVID patients

The Neelakantan 2018 paper showed strong oral absorption in cell uptake (Caco-2) assays, which is why most research community use is by mouth instead of by injection

Most patients notice initial improvements in sleep quality and recovery within 2 to 4 weeks

Glutathione monoethyl ester improves functional recovery, enhances neuron survival, and stabilizes spinal cord blood flow after spinal cord injury in rats