In this case, the B12 shots have started to heal the damaged neurons myelin sheath, but the neural network in which the healed neuron is in, is in a super sensitive state (with extra receptors), so the patient may feel pain or other unpleasant sensations
Some studies revealed that because of high concentration in plasma, UA can act as a pro-oxidant within the cell by scavenging and creating ROS or it can act as an antioxidant, which mainly occurs in plasma [122,123,124]
PLU Laboratories Peptide Research Blog
glutathione S-aryltransferase M3
4.55.5 when dissolved in water Medicine Type Nutraceutical / Dietary Supplement Best Before 24 Months from Date of Manufacture Purity 98% Pure Ingredients Strength 600 mg Each of L Glutathione and NAC per Tablet Chemical Composition L Glutathione 600 mg, N-Acetyl L Cysteine 600 mg, Vitamin C 40 mg, Zinc 10 mg per tablet Effect Improves skin radiance, supports detoxification, and enhances immunity