For those deficient in B12, one shot may provide symptom relief for 5-7 days on average before you start feeling fatigued or off again
Improper Storage (Pre- and Post-Reconstitution): Storing lyophilized powder in a hot car or leaving the reconstituted solution on the benchtop for a week are both recipes for degradation
This assessment is even more relevant if it is considered that the oxidized state would lead to an intramolecular disulfide bond, which usually could not lead to a single reduced Cys residue under reducing conditions, but must allow two bonds with mPEG-MAL, unless the second Cys residue is structurally or spatially hidden
Wang L, Almeida LEF, Spornick NA, Kenyon N, Kamimura S, Khaibullina A, Nouraie M, Quezado ZMN (2015) Modulation of social deficits and repetitive behaviors in a mouse model of autism: the role of the nicotinic cholinergic system
Jelovac N, Sikiric P, Rucman R, Petek M, Marovic A, Perovic D, et al
Therefore, reduced methionine intake can lead to ferroptosis