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Salvia officinalis (Common Sage)
A Mediterranean herb with rosmarinic acid and salvianolic compounds that support cognitive function, menopausal symptom relief, and metabolic health through antioxidant and cholinergic mechanisms.
What the evidence says
Sage doesn't have enough studies with structured effect-size data yet to pool a verdict. Browse the studies below for individual findings.
Most evidence is from high-quality meta-analyses and randomised trials published 2003–2027 with a typical study size of 71 participants.
Based on 28 studies · 4 meta-analyses · 16 RCTs · 964 total participants
Confidence
High confidenceWhat the studies found
By outcome
Multiple small RCTs support sage for memory and metabolic markers and report fewer hot flashes, but a meta-analysis of hot flashes was inconclusive, and small samples, few meta-analyses, and thujone-safety caveats keep evidence moderate.
17 randomised trials
88% were about Sage in an audit of 17 of them
Every randomised or controlled trial of Sage indexed in PubMed, not a hand-picked subset. Meta-analyses and systematic reviews are deliberately excluded from this count: most of them cover many compounds at once, so counting them would inflate it.
PubMed · as of Sep 2026
24 trials ongoing or recruiting · 59 completed on ClinicalTrials.gov
14 of the completed trials have posted results
Registered trials show research momentum for Sage, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Oct 2026
Salvia officinalis (common sage) is a perennial herb native to the Mediterranean basin, long used in traditional medicine across European, Middle Eastern, and Ayurvedic systems.
Its primary bioactive constituents include rosmarinic acid, carnosic acid, carnosol, salvianolic acids, and volatile terpenoids such as 1,8-cineole and thujone.
Modern research has focused on three main areas: cognitive enhancement (particularly acetylcholinesterase inhibition relevant to Alzheimer's disease), relief of menopausal symptoms (especially hot flashes and night sweats), and metabolic support (lipid regulation and antioxidant protection).
Small clinical trials, mostly of single doses, have reported better memory and attention in healthy adults, though a systematic review of them notes methodological issues.
For menopausal hot flashes, small placebo-controlled trials report fewer and milder flushes, but a meta-analysis of 4 studies found a frequency reduction whose confidence interval crosses zero and no significant effect on severity.
Emerging evidence also supports benefits for polycystic ovary syndrome (PCOS), blood glucose regulation, and lipid profiles. Sage is generally well-tolerated at therapeutic doses, though its thujone content warrants caution with prolonged high-dose use or in individuals with seizure disorders.
Sage inhibits acetylcholinesterase (AChE), the enzyme that breaks down acetylcholine, increasing cholinergic neurotransmission and supporting memory and learning.
Rosmarinic acid, carnosic acid, and salvianolic compounds scavenge reactive oxygen species, protecting neurons and peripheral tissues from oxidative damage.
A meta-analysis attributes the hot-flash effect to phytoestrogens with anti-dopaminergic effects. No human study cited here measured estrogen-receptor binding or hormone levels.
Sage extract modulates lipid metabolism and insulin sensitivity, contributing to improvements in triglycerides, LDL cholesterol, and fasting blood glucose.
Certain sage constituents modulate GABA-A receptors and reduce cortisol-mediated stress responses, contributing to anxiolytic and mood-stabilizing effects.
How Sage works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Avoid therapeutic doses of sage supplements during pregnancy due to uterotonic properties. Culinary use (small amounts as spice) is considered safe.
Traditionally used to reduce milk production (antilactogenic effect). Avoid during breastfeeding if maintaining milk supply is desired.
Insufficient safety data for therapeutic use in children. Culinary amounts are safe.
Generally well-tolerated. Cognitive benefits are particularly relevant for older adults. Start at lower doses and monitor for drug interactions with common medications.
Avoid therapeutic doses due to thujone content, which may lower seizure threshold.
Use caution: a phytoestrogenic effect is proposed but not shown in people. Consult a healthcare provider before use if you have estrogen-receptor-positive cancers, endometriosis, or uterine fibroids.
Monitor blood glucose carefully as sage may lower blood sugar. Adjust antidiabetic medication dosing as needed with physician guidance.
Sage has mild anticoagulant properties via inhibition of platelet aggregation; may potentiate anticoagulant medications and increase bleeding risk.
Sage may lower blood glucose; combined use with antidiabetics may cause additive hypoglycemia. Monitor blood glucose closely.
Thujone in sage may antagonize anticonvulsant medications and lower the seizure threshold, potentially reducing medication efficacy.
Additive cholinesterase inhibition may enhance cognitive effects but also increase cholinergic side effects such as nausea and bradycardia.
Sage may have mild hypotensive effects; combined use could produce additive blood pressure lowering.
A hormonal interaction is theoretical. No human study shows sage has estrogenic activity, and the clinical significance is unknown, so caution is advised.
GABAergic activity of sage terpenoids may potentiate CNS depressants including benzodiazepines and alcohol.
Tip: Take with food; reduce dose if symptoms persist
Tip: Stay hydrated; use at lower doses
Tip: Usually dose-dependent; reduce dose or discontinue
Tip: Discontinue use; consult healthcare provider
Tip: Use only standardized extracts at recommended doses; avoid sage essential oil orally
Sage has an evidence score of 6/10 — moderate evidence based on 28 indexed studies, including 2 meta-analyses. A Mediterranean herb with rosmarinic acid and salvianolic compounds that support cognitive function, menopausal symptom relief, and metabolic health through antioxidant and cholinergic mechanisms. Representative study: PMID 37489230.
The commonly studied dose of Sage is 300–600 mg standardized extract daily. Research points to an estimated optimal dose around 500mg standardized extract, with a minimum effective dose near 300mg standardized extract. Individual response varies — start low and adjust.
The best time to take Sage is with meals. Take it with food. Taking sage extract with meals reduces GI irritation from tannins and volatile oils.
Sage should be used with caution — talk to a healthcare provider before taking it. Reported side effects are uncommon and include nausea or GI upset, dry mouth, dizziness or headache. Use caution if any of these apply to you: Epilepsy or seizure disorders (thujone content may lower seizure threshold); Pregnancy (may stimulate uterine contractions; avoid therapeutic doses); Hormone-sensitive cancers (consult oncologist, an estrogenic effect is proposed but not shown in people).
Omega-3
Probably helpsEssential fatty acids critical for brain health, mood regulation, and reducing inflammation throughout the body.
St. John's Wort
Likely helpsModulates serotonin, dopamine, and norepinephrine; studied for mood, with trials in mild-to-moderate depression comparing it to SSRIs — requires drug-interaction caution.
Ashwagandha
Likely helpsReduces cortisol and anxiety while improving sleep quality and physical recovery in stressed adults.
Curcumin
Probably helpsTurmeric's active compound that modulates NF-kB inflammatory pathways — supports mood, joint health, and post-exercise recovery.
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Reviewed by Dr. Baher Al Hakim · Last reviewed May 2026 · evidence from 28 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
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