Weder S, Keller M, Fischer M, Becker K, Alexy U (2022) Intake of micronutrients and fatty acids of vegetarian, vegan, and omnivorous children (13 years) in Germany (VeChi Diet Study)
B12 injection shots can usually be felt within 24 hours (and a change should show in blood tests after a month or two) A high dose of B12 oral supplementation takes the same time as an injection: roughly 24 hours to feel an improvement and then up to 2 months to show in blood markers
A Glutathione and vitamin C treatment takes roughly 15 to 20 minutes
Selenoprotein W Selenoprotein W (SELENOW, formerly SEPW or SelW) exists in different isoforms (homologues) and is highly conserved across species
BNIP3, BCL2 interacting protein 3
Solutions kept at stable refrigerator temperatures generally outlast those exposed to temperature fluctuations or repeated handling, so consistent cold storage is the single biggest factor in maximizing usable shelf life