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To date, research on the role of the EG in S-AKI has mostly been performed in cells or animals, and there have been very few clinical studies

Being off by even 0.2 mL changes your concentration enough to affect dosing accuracy over the life of the vial

Also avoid injecting directly into stretch marks, moles, tattoos, open wounds, surgical scars, or any area with unusual pain or texture

Nasal administration studies provide baseline data, but injectable routes may have different detection characteristics

In contrast, cyanocobalamin is an inactive, synthetic, slightly-toxic form of B12 that the body must convert

Journal of Endocrinology and Metabolism, 3(12), 715