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Rx B12 Cats and small dogs, 1 mL daily
The most reliable signal is independent third-party laboratory results publicly available and verifiable, not upvotes or testimonials
Naturally produced in the liver, this powerful tripeptide (composed of three amino acids: glutamine, cysteine, and glycine) plays a crucial role in detoxification, cellular repair, and immune function
But, there's no "L" and "R" form of glutathione
Pant, A., Cao, S
The enzyme cystathionine--synthase (CBS) that catalyzes the first step in the transsulfuration pathway is highly expressed in liver cells but not highly expressed in peripheral cells, so it is not surprising that the liver is the major producer of GSH, much of which is exported to the plasma and enzymatically broken down to cysteinylglycine and cyst(e)ine that is subsequently taken up by other cells for GSH synthesis
