For injectable or systemic research-compound use, the honest answer is: we do not have long-term human safety data
Animals Male Wistar rats (150-180g, 8week old) were procured from central animal house of Jamia Hamdard, New Delhi
United States Patent Application US20160030502 (A1) Schmacht M, Lorenz E, Stahl U, Senz M (2015) Glutathione overproduction in high cell density continuous cultivation of Saccharomyces spp., 28th International VH-Yeast Conference, Berlin, Germany Schmacht M, Lorenz E, Stahl U, Senz M (2017) Medium optimization based on yeasts elemental composition for glutathione production in Saccharomyces cerevisiae
10.1016/s0014-2999(97)01033-9 121 SikiricP.SeiwerthS.MiseS.StaresinicM.BedekovicV.ZarkovicN.et al (2003)
But it has one well-known vulnerability: stability, particularly in solution and in varying pH environments
Packaging is beautiful and professional too