In one of the largest studies, the Scottish Intensive Care Glutamine or SeleNium Evaluative Trial, a double-blind RCT involving 502 critically ill patients, 20.2 g/day of glutamine was administered via parenteral nutrition (PN)
e1e9 Wegmann M, Fehrenbach H, Fehrenbach A, Held T, Schramm C, Garn H, Renz H 2005 Involvement of distal airways in a chronic model of experimental asthma
Oncology 85(2):95-99, 2013
Now, I opt to get it through other sources: Vega Complete Plant Based Protein Powder Vitamin B complex, which is going to give you all the variations (again with pills quality is HUGE!) From all of my research, this is actually pretty normal
Amen DG, Wu JC, Taylor D, Willeumier K
Optimizing dosage for wound recovery Determining the optimal dosage of glutathione for wound healing can be challenging, as individual needs may vary based on factors such as wound severity, overall health status, and existing glutathione levels