Is It an NMN or a NMN?

It's an NMN. Because the first letter of the abbreviation NMN (Nicotinamide Mononucleotide) begins with a vowel sound, it takes the article an (not a).

It's an NMN. Because the first letter of the abbreviation NMN (Nicotinamide Mononucleotide) begins with a vowel sound, it takes the article an (not a).

An NMN supplement can help support your metabolism.

A NMN supplement can help support your metabolism.

Be aware that the rule for using a or an is based on the initial sound of the following word, not spelling.

In her newsletter, the doctor talks about the recently published results of an NMN clinical trial.

Following this practice, we say an N, and not "a N".

Can you draw an N with ketchup?

A partial list of abbreviations that also begin with N and take "an":

  • an NAD (Nicotinamide Adenine Dinucleotide)
  • an NBA (National Basketball Association)
  • an NDA (Non-Disclosure Agreement)
  • an NFL (National Football League)
  • an NFT (Non-Fungible Token)
  • an NGO (Non-Governmental Organization)
  • an NLP (Natural Language Processing)
  • an NRA (National Rifle Association)
  • an NSA (U.S. National Security Agency)
  • an NYSE (New York Stock Exchange)
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