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However, by this point, you will be deficient in the money you have spent on needless injections, so Save Face recommend a full check-up with either your NHS GP or a private doctor, who can confirm your symptoms and any genuine deficiency with a blood test, and more importantly can prescribe the best type of B12 product and treatment programme to suit your needs.

Acta 1823 , 10071016 (2012)

Biomarker testing measures the actual molecules in your blood, saliva, or other samples that reflect how your body is working at the deepest level

"Cyanocobalamin Drug Usage Statistics, United States, 20062016"

Is a Vitamin B12 Shot safe