Is NMN (Nicotinamide Mononucleotide) Safe with Metformin?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Consult your physician before combining. Monitor blood glucose more frequently. Do not adjust metformin dose without medical supervision.
Why this interaction occurs
Metformin partially exerts its antidiabetic effect by inhibiting mitochondrial complex I, which lowers cellular energy status and activates AMPK. NMN elevates NAD+ levels and may enhance mitochondrial oxidative phosphorylation, potentially counteracting metformin's mechanism. Additionally, metformin has been shown to inhibit NMN absorption via suppression of Slc12a8 transporter activity in preclinical models.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 432,898 reports mentioning Metformin. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Metformin + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All NMN (Nicotinamide Mononucleotide) interactions → · All Metformin interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.