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2014 Nov;351(2):390-402
Individuals who have had gastrointestinal surgery, such as weight loss surgery, may also have fewer cells through which to secrete stomach acid and intrinsic factor, inhibiting B12 absorption
Correct handling only matters if the underlying compound was verified in the first place see our companion guide on reading a peptide Certificate of Analysis for how to confirm purity and identity before a vial ever reaches the bench
Any of these make the vial unusable
Because bad peptides lead to bad science
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