alpha glutathione s-transferase S-transferase: A versatile and dynamic enzyme Glutathione S-Transferase | Oxford Biomedical
Description
Maussang and co-workers showed in an in vitro model that GSH-PEG liposomes penetrated the BBB via a carrier-mediated active transcytosis mode and the penetration was increased in proportion to the amount of GSH-PEG used [41]

This form is more expensive to produce, but it is in what is called an "active" state

Repine JE, Bast A, Lankhorst I

Sachpekidis C, Weru V, Kopp-Schneider A, Hassel JC, Dimitrakopoulou-Strauss A

Komaki R, Wei X, Allen P, Roth JA, Swisher S, Rice DC , Walsh GL, Fossella FV, Erasmus JJ, Cox JD

This makes it more targeted for fat loss without the broader effects on growth and IGF-1 levels
