US$ 24.50
types of vitamin b12 injections What are the Different B12? Best Vitamin B12 Injection Site:
Description
Taking the 5 amino 1mq injection 30-60 minutes before the first meal of the day, in a fasted state, may enhance metabolic benefits by promoting fat oxidation during the fasting period

In our experience from member comments, no primary care doctor in the UK has access to, or has heard of, this test
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References Deaglio S, Vaisitti T, Billington R, Bergui L, Omede P, Genazzani AA et al (2007) CD38/CD19: a lipid raft-dependent signaling complex in human B cells

doi: 10.1016/j.cmet.2015.05.023

A vitamin B12 supplement is another option if you're not getting the recommended 2.4 micrograms per day