red urine after b12 injection is from Does a B12 shot change urine color to pinkish? Vitamin B12 Injection: Energy Boost

This lifelong therapy rapidly corrects deficiency, restores red blood cell production, and protects nerve function

This is the first step in another adenosine production pathway, which typically includes CD39 catalyzing adenosine triphosphate (ATP) to produce adenosine monophosphate (AMP)

For example, Trp is the necessary precursor for the de novo NAD + biosynthetic pathway (also known as the kynurenine pathway)

Try to find one that contains right around the RDA for this vitamin, or only a bit more, and see if you can find a methylated one (that is, methylcobalamin)

doi: 10.52793/JSCR.2025.6(2)-77 146 Swolverine