side effects of b12 injection uk Vitamin Injections for Pernicious Anaemia: Treatment Guide – Bolt Pharmacy What are the Benefits of
Description
The clinical methodology was appropriate for an obesity drug: randomized, double-blind, placebo-controlled, multicenter designs with body-weight and body-composition endpoints, supported by dedicated safety, tolerability, and pharmacokinetic studies

So there would be zero point in testing iron or B12 since both are being supplemented

Associations between B Vitamins and Parkinsons Disease

Any Vitamin B12 that is not required by the body is excreted in the urine

Campbell, J, Larson, R, Black, C, and McGuire, K

May support reductions in fat mass while preserving lean muscle in animal models [8] [9]