can you have b12 injections every month Vitamin B12: How Frequently Should I Get It? How Often Should You Get
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The Science Behind the Boost Vitamin B12 is essential for red blood cell production, nerve health, DNA synthesis, brain function, and energy metabolism

You can buy vitamin pills off the counter without a doctors supervision or prescription
"Weight loss: Safety and efficacy of a peptide fragment (AOD-9604) in promoting fat metabolism." Obesity Reviews, 9(1), 23-29

They are stable at higher temperatures and under acidic conditions, which may be required for conjugation to radionuclides

The most common forms used are cyanocobalamin (stable, widely available) and methylcobalamin (the active form, preferred by some providers for neurological support)
