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doi:10.1007/s10815-019-01461-6

264 Further, there are other redox systems similar to the Trx system in the body, such as the glutathione (GSH) system

It shows an ability to protect the skin against oxidative stress and cells against UV radiation as well as reducing inflammation, including modifying the expression of metalloproteinases [6,7]

However, not all forms are equal in efficiency: Oral Glutathione Common forms of oral glutathione often suffer from low bioavailability and can oxidize before absorption

Our team has observed that for studies focusing on long-term, sustained NNMT inhibition where slight variations in peak plasma concentration aren't catastrophic, the oral route might be sufficient

which can be enzymatically reduced back to GSH via NADPH-dependent glutathione reductase (GSR) activity [11]