(from sunflower)
Analysis of transgenic poplars provides evidence that GSH1 is a rate-limiting enzyme for GSH synthesis [71]
A 2022 study published in the Journal of Pharmaceutical Sciences found that reduced L-glutathione stored at room temperature (25C) lost 40% potency within 90 days
Your body produces it naturally, and its present in virtually every cell, as written in WebMD article Glutathione: What you should know
C (101 MHz, CDCl 3 ) 171.09 (C), 134.80 (t, J = 23.8 Hz, CD), 133.12 (td, J = 24.8, 9.9 Hz, CD), 130.22 (td, J = 24.7, 12.5 Hz, CD), 117.87 (d, J = 85.8 C), 38.67 (CH 2 ), 38.37 (CH 2 ), 27.54 (CH 2 ), 26.86 (d, J = 16.7 Hz, CH 2 ), 22.31 (d, J = 51.3 Hz, CH 2 ), 21.72 (d, J = 4.3 Hz, CH 2 )