too much vitamin b12 injections Are Shots Right for You? The Power of B12 Injections:

In fact, increased energy is one of the most promised benefits of B12

The dosage of AOD9604 used in this study or 0.25 mg per injection, was carefully calculated to be molar equivalent to doses of full-length GH shown to be effective in prior rabbit OA studies

United States (FDA and DSHEA) Not FDA-approved for weight loss or fat-burning claims AOD9604 was previously investigated as a potential obesity treatment, but the FDA has not approved it as a prescription medication (FDA PCAC briefing)

Kruis, T., Batra, A

The same principle likely applies here

Many people in Oldham and across the UK do not get enough B12 from their diet alone