I would encourage patients to speak to their practice if they have concerns about their B12 treatment
The food and drug administration of Philippines clearly states the following in an advisory: Side effects on the use of injectable glutathione for skin lightening include toxic effects on the liver, kidneys, and nervous system
L-Glutathione the master antioxidant that switches melanin from dark eumelanin to lighter phaeomelanin, progressively brightening skin tone and reversing skin darkness
By boosting the immune system, glutathione strengthens the body's defences against illness and disease
The role of glutathione in the body is to protect cells from oxidative damage caused by free radicals and other harmful substances
Approaches such as intrathecal, intracerebroventricular, and intraparenchymal injections, as well as transient BBB disruption, have been employed to deliver drugs with limited CNS bioavailability (Rezaee et al., 2025)