glycine nac glutathione biosynthetic scheme. N-acetyl-L-cysteine (NAC) can supply Gly NAc Caps | 1.6
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doi: 10.1016/j.bbadis.2011.08.005

This means that 100% of the nutrients are delivered straight to where they are needed, unlike when taken orally where only a small fraction gets absorbed and is able to be utilised by the body

Bifari F, Lisi V, Mimiola E, Pasini A, Krampera M

One reviewer in particular writes I am vegetarian and my levels of vitamin B12 were low
