NAD+

Published research areas

Fields in which this compound appears in the published literature. These describe where the research sits, not what it concluded.

Cellular energy metabolism

The coenzyme's role in oxidation-reduction reactions is foundational biochemistry, and the literature is correspondingly large and old.

Sirtuin and enzyme studies

Used as a substrate in work on enzymes that consume it, which is a substantial part of current published research.

Aging research models

Investigated in laboratory models examining changes in coenzyme availability with age.

What the analysis should cover

• This is not a peptide, and several standard peptide analyses simply do not apply. There is no sequence to confirm, and net peptide content is not a meaningful figure for it.
• Identity by mass spectrometry, supported by the characteristic ultraviolet absorbance of the nicotinamide and adenine components.
• Purity by HPLC with the chromatogram reproduced. The relevant impurities are its own breakdown products rather than truncated sequences.
• Water content, which matters more here than for most material — it is markedly hygroscopic.

How to read a certificate of analysis covers what each of these measurements establishes.

Handling and stability

• Considerably more moisture-sensitive than a typical freeze-dried peptide, and it draws water from room air quickly once a container is open.
• Sensitive to alkaline conditions, under which it degrades faster than most peptides would.
• Stored cold, dry and dark in the sealed container as supplied.

Why peptides ship freeze-dried sets out the reasoning behind these conditions.