In humans, GPx4 exists in three alternatively spliced isoforms: cytosolic GPx4 (cGPx4), mitochondrial GPx4 (mGPx4) and sperm nucleus GPx4 (snGPx4) [1, 8]
The organization also warns that since its not approved for human clinical use by any global regulatory authority, it may lead to negative health effects including immunogenic reactions (antibodies), peptide impurities, and limited safety data for proposed routes of use
Investigative Ophthalmology & Visual Science, 37 (9), 17201723
So happy with my results a month after starting these injections
Tetrahydrofolic acid, methyltetrahydrofolate, and other folic acid congeners are essential for the maintenance of normal erythropoiesis and are also required cofactors for the synthesis of purine and thymidylate nucleic acids