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Thats because peptides degrade easily in the digestive tract and tend to be too large molecularly to permeate the skin or intestinal lining,5 often yielding a bioavailability as low as 1-2%.6 But there are some peptides that have a small enough molecular size that they easily transfer into the bloodstream as either an oral or a topical supplement

NMN provides the raw material needed to produce NAD+

This portion is therefore considered the active or usable form of B12

Mass spectrometry confirming correct molecular weight

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