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Though allergies to cobalt are rarely dangerous, taking any form of B12 supplement, whether by injection, tablet, or topically applied gel, may result in an uncomfortable, itchy rash

Cyanocobalamin, a slightly toxic, synthetic form, is especially dangerous to pernicious anemia patients

NAD+ supports metabolism, DNA repair, cell defenses, circadian rhythm coordination and other cellular processes which leads to better quality of life

Below are the step-by-step instructions that show how to self-inject the vitamin B12 safely

A study published in 2020 found that women with sufficient vitamin B12 levels had better reproductive outcomes

But this is only temporary and can usually be reversed with folate supplements