b12 injection you tube How to self-inject intramuscular vitamin - Overview Vitamin B12 Injection - Self
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However, cyanocobalamin works well for most people and costs significantly less

Vitamin B12 is not just another vitamin

Unlike oral supplements, which rely on the digestive tract, injections deliver nutrients directly to your system for quicker uptake and better bioavailability

Discovery, synthesis, and biological evaluation of thiazoloquin(az)olin(on)es as potent CD38 inhibitors

But as a good practice, maintain hydration and adequate protein intake
The problem is that many people are unable to make that conversion in their bodies because they have a genetic mutation that prevents it