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Sources of vitamin B12 and why you need it Vitamin B12 is vital for red blood cell production, DNA synthesis, and proper nerve function

TCN2 ( Transcobalamin II ) TCN2 is a gene that helps cells use a particular form of vitamin B12

In these cases, oral supplements are often ineffective, and injections are required to bypass the digestive system

[5] When B12 and folate deficiency coexist, B12 replacement should be started before or alongside folic acid (typically 5mg daily) to avoid worsening neurological symptoms

If you can block time once a month and want the most powerful intervention NAD+ IV If you want steady, reliable support without the time commitment NAD+ Injections If convenience is paramount and youre okay with lower efficacy Nasal Spray At Refine by Tulsi, we help you choose based on your real life not a textbook protocol