10.1093/humupd/dmv021 36 GamulinO.SerecK.BiliV.BalarinM.KosoviM.DrmiD.et al (2013)
Subcutaneous B12 injections are given under the skin, typically in the abdomen or outer thigh
The FD&C Act makes it clear it is not legal for any person to introduce or deliver for introduction into interstate commerce unapproved drugs
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Full reference Brent Grymonprez, Rayco Lommelen, Jakob Buss, Koen Binnemans, Sofa Riao, Solubility of di-(2-ethylhexyl)phosphoric acid (D2EHPA) in aqueous electrolyte solutions: Studies relevant to liquid-liquid extraction, Separation and Purification Technology, 333, 125846, 2024, Acknowledgements This research was possible thanks to the European Research Council (ERC) European Unions Horizon 2020 Research and Innovation Programme: Grant Agreement 694078Solvometallurgy for Critical Metals (SOLCRIMET).
After completing a treatment cycle, taking 2 to 4 weeks off before potentially repeating allows assessment of maintained improvements