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I was diagnosed with low B12 almost 2 years ago and while I had to diagnose myself, my GP was very helpful and seemingly knowledgeable after it was discovered
Metformin, a diabetes drug, also lowers B12 absorption
Patience matters here
[2] [11] As of 2026, retatrutide has not received marketing authorisation from the Medicines and Healthcare products Regulatory Agency (MHRA) or the European Medicines Agency (EMA), and it remains an experimental compound available only within authorised clinical trial settings
Unfortunately, studies on this topic have mainly focused on normalising serum B12 concentrations with oral supplementation and should be interpreted with caution since the specific goal of treatment in symptomatic B12 deficiency is alleviating symptoms, and NOT to normalize B12 concentrations in the blood
