Last verified: 17 days ago
Peppermint Leaf
Also known as: Mentha x piperita, Mentha piperita, peppermint, spearmint leaf
Evidence under review. — Not yet rated
Herbal leaf rich in polyphenols and menthol. Some digestive benefits noted, but human evidence is limited.
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What it does
Peppermint leaf comes from the Mentha x piperita plant and contains polyphenols (like eriocitrin and rosmarinic acid) and essential oils including menthol. Lab studies show its polyphenols can...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
No established dose from provided studies for humans
What the Science Says
Peppermint leaf comes from the Mentha x piperita plant and contains polyphenols (like eriocitrin and rosmarinic acid) and essential oils including menthol. Lab studies show its polyphenols can trap compounds linked to blood sugar damage (glycation), and it has been used historically for digestive complaints. One review notes peppermint oil — derived from the leaf — may help with irritable bowel symptoms and tension headaches, though the leaf itself has limited standalone human trial data.
What It Doesn't Do
Won't detox your body — a clinical trial testing a multi-ingredient detox blend containing peppermint leaf found zero improvements in body composition, waist size, or gut symptoms. No human evidence it fights antibiotic-resistant bacteria in people. Animal studies showing growth benefits in chickens don't translate to humans. Don't expect blood sugar control from peppermint leaf tea alone based on current evidence.
Evidence-Based Benefits
Peppermint leaf polyphenols can trap sugar-damaging compounds in lab tests.
Weak EvidenceEffective at: No established human dose
Supporting studies (click to view on PubMed):
Peppermint leaf has a long history of use for digestive complaints like indigestion.
Weak EvidenceEffective at: No established human dose from provided studies
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Unknown — polyphenols like eriocitrin and rosmarinic acid extract well into tea (about 75% yield in infusion studies), but human absorption and clinical relevance are not established from the provided papers.
Red Flags to Watch For
- Most available evidence comes from lab (in vitro) or animal studies, not human clinical trials
- Often sold in proprietary blends where the peppermint leaf dose is unknown and untested
- Detox products containing peppermint leaf have been clinically tested and shown no benefit
- Higher doses of peppermint oil (not leaf) can cause significant adverse effects — dose matters
- Copper nanoparticles made from peppermint extract are experimental and not a supplement you should take
Products Containing Peppermint Leaf
See how Peppermint Leaf is used in these analyzed products:
Frequently Asked Questions
What does Peppermint Leaf do?
Herbal leaf rich in polyphenols and menthol. Some digestive benefits noted, but human evidence is limited.
What is the effective dose of Peppermint Leaf?
No established dose from provided studies for humans
Is Peppermint Leaf safe?
Most available evidence comes from lab (in vitro) or animal studies, not human clinical trials
What doesn't Peppermint Leaf do?
Won't detox your body — a clinical trial testing a multi-ingredient detox blend containing peppermint leaf found zero improvements in body composition, waist size, or gut symptoms.
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25