Dr. Grey AI

Menthol

Menthol is a cyclic monoterpene alcohol from peppermint and other mint oils that activates cold-sensing TRPM8 receptors, producing a cooling sensation. Used topically for pain relief (muscle aches, headaches) and in oral products. Interesting research for exercise in heat - menthol mouth rinse creates perception of cooling without actually lowering body temperature, potentially improving hot-weather performance. Also used in IBS (peppermint oil) for antispasmodic effects. Generally safe topically; internal use requires caution.

Quick Answer

What it is

Menthol is a cyclic monoterpene alcohol from peppermint and other mint oils that activates cold-sensing TRPM8 receptors, producing a cooling sensation. Used topically for pain relief (muscle aches, headaches) and in oral products.

Key findings

  • Grade B: Abdominal Pain/Spasms
  • Grade C: Pain Relief (Topical)
  • Grade C: Thermal Comfort

Safety

  • Generally safe topically; internal use requires caution.
ℹ️ Quick Facts: Menthol

Quick Facts: Menthol

  • Best Evidence:Grade C
  • Conditions Studied:1
  • Research Outcomes:5
  • Grade B Findings:1
  • Key Effect:Tension Headache
Outcomes by grade:
A0
B1
C4
D0
1 conditions · 5 outcomes

Detailed Outcomes

|
B
Abdominal Pain/Spasms
Peppermint oil (enteric-coated) is effective for IBS symptoms - menthol is the key active
12 studies
moderate↓Improves
C
Pain Relief (Topical)
Topical menthol products provide short-term muscle pain relief
10 studies
moderate↓Improves
C
Thermal Comfort
Menthol mouth rinse improves perceived thermal comfort during exercise in hot conditions
8 studies
moderate↑Improves
C
Endurance Performance
Small improvements in time to exhaustion and self-paced performance in heat
6 studies
small↑Improves
C
Headache Pain
Topical peppermint oil (10% menthol) as effective as acetaminophen for tension headache
3 studies
moderate↓Improves

Evidence by Condition

Best grade per condition (each condition may have multiple outcomes)

CTension Headache
1
↓Headache PainImproves

Related Supplements

Peppermint

1 shared condition · 36 outcomes

Peppermint (Mentha piperita) is a hydrid plant that is used for its sensory properties (aroma and taste) and the oil is used internally as a carminative and intestinal aid. It appears to be well supported for relaxing the stomach and intestines, and effectively reduces abdominal pain in IBS.

Gluten

1 shared condition · 4 outcomes

Gluten is a protein complex (gliadin + glutenin) in wheat, barley, and rye that gives dough its elasticity. MUST be strictly avoided by those with celiac disease (autoimmune). May cause symptoms in non-celiac gluten sensitivity (NCGS), though this is controversial and may overlap with FODMAP sensitivity. For healthy individuals WITHOUT celiac or NCGS, there is NO evidence that gluten-free diets provide health benefits - and they may reduce fiber and nutrient intake. Gluten-free mania is largely unwarranted for the general population.