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However, WADA-accredited laboratories have developed and continue to develop mass spectrometry methods capable of detecting peptides at low concentrations in urine and blood samples (WADA Accredited Laboratories)
The key advantages include: Fast-Acting Relief: Injections deliver B12 directly into your bloodstream, allowing for quicker absorption and faster results compared to oral supplements
Limited evidence for peptide benefits but biological plausibility exists
Some letters state that the reason B12 injections are being stopped is many patients are being over treated with this vitamin
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