You can also get it from supplements, but most of it is broken down by enzymes in the gut into amino acids, such that only long-term use of large amounts (500 mg or more) appears to modestly raise glutathione levels
Theres no established upper limit for B12 intake
Order enough for 4 to 6 weeks at a time, reconstituting fresh batches as needed
doi: 10.3389/fncel.2019.00558, 52 FoxP
S., Hooda, A., Moriarty, T
Some users also explore it as an adjunct in post-procedure skin routines, where barrier support and visible recovery are priorities