If the underlying issue isnt addressed - whether its inflammation, structural imbalance, or nervous system dysregulation - results may be temporary or minimal
However, if its sustained beyond whats needed for the temporary repair of bodily tissues and shifts to a chronic state, the brain and nervous system can be negatively impacted and mood disorders can result
Molecules of nutritional value with antioxidant properties besides GSH, like selenium, zinc and polyphenols, are important in the immune response against SARS-CoV-2 that occurs primary in the lungs (Prez de la Lastra et al., 2021) in critically ill patients with severe COVID-19 acute respiratory distress syndrome (Notz et al., 2021)
It is safe to use if you use it carefully in your routine
Furthermore, the extent of such side effects depends on the desired dosage