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Head-to-head evidence comparison — which supplement is right for you?
Huperzine A vs Spearmint: Spearmint has the stronger overall evidence (6.2 vs 6/10); they're alternatives for sharpen focus — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Spearmint wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Too few graded studies
1 of 2 studies with measurable effects showed benefit.
Top outcomes
Verdict
Too few graded studies
Top outcomes
Shared outcomes (2)
Outcomes where both Huperzine A and Spearmint have evidence — compare verdict strength side-by-side.
50-200mcg twice daily
Morning and early afternoon, Avoid evening (may cause vivid dreams)
Huperzine A capsules (standardized extract)
900 mg/day of standardized spearmint extract (or 2 cups of spearmint herbal tea daily)
Morning with breakfast, Evening with dinner (split dosing mirrors clinical trial protocols)
Standardized aqueous extract (high-rosmarinic acid)
and 1 more not shown
2-4 weeks
30-60 minutes
2-4 weeks
During use
2–4 weeks
4–12 weeks
4–8 weeks
8–16 weeks
The treatment of cognitive dysfunction in dementia: a multiple treatments meta-analysis
Psychopharmacology (2018) · Meta analysis · n=44854
The pooled standardized mean difference of the treatment effects on cognitive dysfunction was 0.439 (95% confidence interval 0.374, 0.504).
Traditional Chinese herbal medicine for vascular dementia
The Cochrane database of systematic reviews (2018) · Systematic review · n=3581
Two TCHMs (NaoMaiTai and TongXinLuo) had a 5% or more increased risk of AEs compared to the 'no Treatment' control, but the quality of this evidence was poor.
Interventions to delay functional decline in people with dementia: a systematic review of systematic reviews
BMJ open (2016) · Systematic review · n=70
The quality of the reviews varied; however most (65%) scored 8/11 or more on the AMSTAR tool, indicating high quality.
An evidence-based systematic review of spearmint by the natural standard research collaboration.
Journal of dietary supplements (2010) · Systematic review
An evidence-based systematic review of spearmint (Mentha spicata, Mentha viridis) including written and statistical analysis of scientific literature, expert opinion, folkloric precedent, history, pharmacology, kinetics/dynamics, interactions, adverse effects, toxicology, and dosing.
A systematic review of the efficacy of alternative medicine in the treatment of nausea and vomiting of pregnancy.
Journal of obstetrics and gynaecology : the journal of the Institute of Obstetrics and Gynaecology (2020) · Systematic review
Spearmint syrup is listed among several herbal options the authors call effective for mild to moderate nausea and vomiting of pregnancy.
Spearmint herbal tea has significant anti-androgen effects in polycystic ovarian syndrome. A randomized controlled trial.
Phytotherapy research : PTR (2010) · Rct · n=42
Forty-one of 42 women with PCOS completed this 30-day RCT comparing spearmint tea twice daily with a placebo herbal tea.
Doses are per day. At 200 mcg (0.1 mg twice daily), a double-blind trial in 78 people with mild to moderate vascular dementia improved MMSE, CDR and daily living scores over 12 weeks (PMID 21833673). At 400 mcg (200 mcg twice daily), the primary analysis of a phase II trial in 210 people with Alzheimer's disease found no effect on ADAS-Cog at 16 weeks, so the curve stays flat rather than rising (PMID 21502597). At 800 mcg (400 mcg twice daily), the same trial found a 2.27-point ADAS-Cog gain at 11 weeks that was no longer significant at 16 weeks. A meta-analysis of four trials using 300 to 500 mcg a day found MMSE and daily living gains (PMID 19221692). The trials are in different populations and only one compared doses, so no minimum, optimal or safe ceiling is set.
Both points come from one 90-day RCT in 90 adults with age-associated memory impairment, 30 per arm, at 0, 600 or 900 mg of extract a day (PMID 29314866). Quality of working memory improved by 15% and spatial working memory accuracy by 9% versus placebo at 900 mg only, so 600 mg is plotted as no effect. The same trial found no effect of either dose on safety markers over 90 days (PMID 28286189). No dose above 900 mg was tested, and the effect may be smaller in people without memory complaints.
AI-estimated from published studies. Interpret as directional guidance.
Spearmint has a higher evidence score (6.2/10 vs 6/10) and wins in 2 of 3 categories.
For sharpen focus, Huperzine A has a higher relevance score (80 vs 65).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.