Most reviews are biased by an oversimplified picture where bad free radicals cause all sorts of diseases and good antioxidants protect from them and prevent oxidative stress
Within the folate cycle 5,10-methylene-THF is converted to 5-methyl-THF by methylene THF reductase which is encoded by the MTHFR gene
doi: 10.1371/journal.pone.0151156 169 VivianoM.BarresiE.SimonF
[9] Deep intramuscular administration into the gluteal muscle using a 22-gauge needle is recommended, and patients who self-inject must be trained in aseptic technique, site rotation and safe sharps disposal to reduce infection and tissue-injury risk
Oxidative Stress and Proliferative Vitreoretinopathy Proliferative vitreoretinopathy (PVR) is a complication of rhegmatogenous retinal detachment surgery or severe ocular trauma, including intraocular foreign bodies, perforation, penetrating injury, contusion, or globe rupture [279]