glutathione in beetroot does has Lymph lovin' foods: Beetroot 101: Nutrition Facts and – Natural Glutathione for glowing skin,

Although these are ideal sources of glutathione, they are largely produced in the human body from glutamate, glycine, and cysteine amino acids, which are easily available from protein-rich foods

Back TG, Moussa Z (2003) Diselenides and allyl selenides as glutathione peroxidase mimetics

This produces a senescent phenotype of skin cells, leads to the release of innate immune molecules, which trigger autoimmunity, and ultimately causes dysfunction and death of melanocytes

IV glutathione and injections are controversial, with limited evidence for cosmetic benefits and important safety concerns raised by regulators

Wilkens, 2015)