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why do i feel worse after b12 injections My Injection? · PA Relief Feeling worse after starting B12
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Five patients were excluded because of high vitamin B12 serum levels before the start of treatment (related to previous use of vitamin B12 tablets or vitamin B12 injections)

Methionine is an essential amino acid that must be supplemented through ones diet

It is a small molecule, not a true peptide, even though it is often sold alongside research peptides
