glutathione or niacinamide which is better for skin whitening vs Niacinamide: Best Glowing Skin? and youthful appearance both instantly and over time. Effective Solutions for Dry Skin:

J Am Acad Child Adolesc Psychiatry 49:256266

A doctor or dermatologist should be consulted before deciding whether to administer glutathione as a pill or an injection

This is where supplementation with L-glutathione, the active form of glutathione, comes in

Anti-inflammatory nutrients and obesity-associated metabolic-inflammation: state of the art and future direction

If you have very pronounced dark marks or melasma, glutathione alone might only provide partial lightening

This process is partly mediated by the upregulation of brain-derived neurotrophic factor (BDNF), a neurotrophin that promotes neuronal survival, synaptic plasticity, and functional connectivity, ultimately supporting memory consolidation and executive function [77]