NAD+ vs NADH vs NMN vs NR: A label decoder
What's the difference between NAD+, NADH, NMN and NR?
NAD+ and NADH are the oxidized and reduced forms of the same coenzyme. NMN and NR are different molecules that cells can use to make NAD+.
Sort the acronyms into two groups
| Label | Full name or form | Role |
|---|---|---|
| NAD+ | Nicotinamide adenine dinucleotide, oxidized form | Accepts electrons in metabolic reactions and serves as a substrate for some enzymes. |
| NADH | Nicotinamide adenine dinucleotide, reduced form | Carries electrons it can transfer in later reactions. |
| NMN | Nicotinamide mononucleotide | A precursor that can be converted to NAD+. |
| NR | Nicotinamide riboside | A precursor that can enter an NAD+ synthesis pathway through NMN. |
The word precursor describes where an ingredient can enter a biochemical pathway. A pathway diagram can't tell you how much of an ingredient taken by mouth reaches a particular tissue. Read the review of NAD+ metabolism. Read how NAD+ and NADH trade electrons.
Decode the front and back of the label
If a front label says “NAD+ support” and the ingredient list names NR, the molecule to look up is NR. “NAD+ support” describes the idea behind the formula. The ingredient list tells you what the product contains.
Use the same trick when someone sends you a paper. A 2018 human trial studied oral NR and measured NAD-related changes. Another trial studied oral NMN and measured muscle insulin sensitivity in a specific group of women with prediabetes. Each study has its own compound, population and outcome. Read the NR trial. · Read the NMN trial. See how nasal NAD+ compares with oral products.
Is NAD+ a peptide?
NAD+ is a dinucleotide coenzyme. Peptides consist of amino acid units joined by peptide bonds. Stores may group NAD+ and peptides together, but the names describe different kinds of molecules. See the IUPAC definition of a peptide.