syringe needle for vitamin b12 injections Red Liquid in a Disposable with a and in a Glass Ampoule on a White Background. Stock Photo B12 Shots for Weight Loss:

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PMID 34232116

And excess intake doesnt pose any health risks

Proper red blood cell production, supported by Vitamin B12, is essential for preventing megaloblastic anemia and ensuring optimal oxygenation, which impacts overall vitality and cardiovascular health

In line with these findings, we previously found that DPI (10 M) increased Glutathione Peroxidase 1 (GPX1), GSR and Glutathione Synthetase (GSS) protein expression levels in MNA cells (16)