substance P
noun
: a neuropeptide that consists of 11 amino acid residues, that is present in the nervous system and gastrointestinal tract, that causes the contraction of smooth muscle and dilation of blood vessels, and that acts as a potent neurotransmitter especially in the transmission of signals from pain receptors
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According to the American Migraine Foundation, magnesium decreases substance P and glutamate.
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Allison Futterman, Discover Magazine, 4 Apr. 2024
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Allison Futterman, Discover Magazine, 4 Apr. 2024
Cite this Entry
“Substance P.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/substance%20P. Accessed 15 Jul. 2025.
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