Only a medical professional can conclusively determine if you have a vitamin B12 deficiency
When evaluating suppliers, researchers should look for third-party testing certificates showing purity of 98% or higher, clear documentation of the compound identity, established reputation in the research community, and responsive customer service that can answer technical questions
B3 that is not methylated can be instead transformed into another molecule called nicotinamide adenine dinucleotide (NAD+), which is essential for producing energy, repairing DNA, and other benefits
How much and how often you need it depends on you
The Cenexa Labs Gold Standard Most peptide sites simply resell vials from overseas labs with little oversight or testing (Much of it is either fake or laced with contaminants)
This injection is already providing a high dose of several B vitamins, far above typical multivitamin doses