side effects of l-glutathione S-Acetyl-L-glutathione:Preparation; Benefits and effects_Chemicalbook Glutathione IV Drip for Skin

Endogenous IGF-1 is critical to human NK cell cytotoxicity Protein array data have shown IGF-1 to be preferentially produced by CD56 dim NK cells relative to CD56 bright NK cells 22 , suggesting that human NK cells have the ability to produce IGF-1

Acknowledgements: The authors express their gratitude to Gabor Tornyai for his excellent technical help

That's a bigger result

Second, published human clinical-trial data is sparse

Research measuring inflammatory markers shows the combination lowers pro-inflammatory cytokines (IL-6, TNF-alpha) by 6080%, versus 3040% for either peptide alone translating to less pain, less swelling, and a faster return to function without sacrificing healing quality

doi:10.1016/j.ajpath.2014.12.012