Full profile
| Also known as | Neumentix, Mentha spicata |
|---|---|
| Best for | Working memory support · Attention support |
| Evidence grade | Grade B — Moderate — several human trials, some mixed results |
| Studied dose range | 900 mg/day of standardized extract. |
| Time to effect | Acute attention signal within hours; working-memory benefit studied over 90 days. |
| Best form | Neumentix, standardized to roughly 14.5–24% total phenolics including rosmarinic acid. |
Evidence, honestly graded
Herrlinger 2018 (J Altern Complement Med) ran a 90-day RCT of Neumentix in adults with age-associated memory impairment and found improved working memory, with a follow-up acute-attention trial extending the signal. Capped at B: the pivotal data sits in a memory-impaired rather than broad healthy-adult population, the trials are Kemin-funded (the extract's developer), and effect sizes sit near the threshold of clinical meaningfulness.
See the full grading rubric — study type, replication, population match, and dose adequacy — in The Evidence Standard.
Side effects
- Generally well tolerated
Who should avoid it or check first
- Pregnant or breastfeeding without clinician guidance (limited data)
Interactions
- No material known interactions
Stacks well with
- L-Theanine
- Citicoline
What to look for on a label
- Specify the branded Neumentix extract and its phenolic standardization — plain spearmint extract doesn't guarantee the studied material.
References
- Herrlinger 2018, J Altern Complement Med — Neumentix 90-day RCT. Adults with age-associated memory impairment; 90-day dosing improved working memory versus placebo, with a follow-up acute-attention trial. Kemin-funded; educational, not a product claim.
Primary citations for some entries above are still being compiled; those without a linked identifier are editorial summaries of the wider literature.
Grades and studied doses are our conservative reading of the human research, shown for education. They are not product claims, and a studied dose is not a recommended dose.
See how Spearmint Extract compares on grade, dose, and goal in the Evidence Explorer.