Sage (Salvia officinalis)
Sage (Salvia officinalis) is a culinary and medicinal herb of the Lamiaceae (mint) family, native to the Mediterranean. It has a long ethnobotanical history in menopausal-symptom and hyperhidrosis (excess sweating) use. Modern clinical evidence is small but consistent for hot-flush reduction with standardised extracts. No UK-authorised health claim. Thujone content (a neurotoxic monoterpene ketone in the essential oil) is the principal safety consideration — leaf extracts are typically much lower in thujone than the essential oil but manufacturer disclosure is the responsible standard.
Camden Medicals editorial · Last reviewed 2 May 2026 · Next review May 2027
- Cross-checked against
- NHS
- NICE
- BNF
- EFSA
- FSA
Camden's editorial team independently graded each health claim below on the strength of the published evidence — see the grade beside every condition.
- Class
- Botanical
- Typical daily dose
- The Bommer 2011 trial dose was 280 mg/day fresh-leaf-equivalent of a standardised extract for 8 weeks. UK supplement labels commonly use 200–600 mg/day.
- Top use evidence
- Limited
On this page
What it is
Sage (Salvia officinalis, sometimes labelled "common sage" or "Dalmatian sage") is a perennial woody herb of the mint family. The dried leaf and the aqueous / hydroethanolic leaf extract are the medicinal preparations; the essential oil (typically steam-distilled) is a more concentrated and more thujone-rich preparation used in flavouring and aromatherapy.
The leaf contains rosmarinic acid (the most-cited phenolic acid marker), carnosic acid, carnosol, ursolic acid, flavonoids (luteolin glycosides, apigenin), and an essential-oil fraction rich in α-thujone, β-thujone, 1,8-cineole, camphor, and borneol. Standardised leaf extracts in clinical trials are typically declared as fresh-leaf or dry-leaf equivalents (e.g. "280 mg fresh-leaf equivalent") rather than as a single bioactive marker.
Thujone (α and β isomers combined) is the regulatory and safety pivot: at high chronic doses thujone is a GABA-A antagonist associated with seizures, hepatotoxicity, and neurotoxicity. UK legacy guidance (retained from EU Directive 88/388/EEC) limits thujone in food and drink to specific milligram-per-kilogram levels. Standardised aqueous / hydroethanolic leaf extracts typically deliver much less thujone than the essential oil, but Camden's encyclopaedia look-for bar is that the manufacturer discloses the thujone level on the specification sheet.
At a glance
- Culinary / medicinal herb with traditional menopausal hot-flush + hyperhidrosis use.
- No UK-authorised health claim. EFSA evaluation on hold. Marketing must be descriptive.
- A small open-label multicentre trial (Bommer 2011) reported ~50 % reduction in hot flush severity over 8 weeks at 280 mg fresh-leaf-equivalent extract daily.
- Thujone in sage essential oil is the safety concern — UK legacy guidance limits thujone in food/drink. Standardised leaf extracts are usually much lower; manufacturer disclosure of thujone content is the responsible standard.
- Avoid in pregnancy, breastfeeding, epilepsy, and active liver disease. Talk to your prescriber if you take diabetes medication, sedatives, or anticonvulsants.
What people use it for
Post-menopausal women with bothersome hot flushes seeking a non-hormonal botanical option
Bommer 2011 (open-label multicentre, n=71) reported ~50 % reduction in hot flush severity-frequency score over 8 weeks at 280 mg/day standardised fresh-leaf equivalent. Subsequent smaller RCTs (Dadfar 2019, Zeidabadi 2019) report similar direction-of-effect. The evidence base is small in absolute terms; effect sizes vary by extract preparation. Effects typically appear by week 4–8. [3]
Some evidenceLimitedAdults with primary focal or generalised hyperhidrosis (excess sweating)
Sage has a traditional and modest contemporary evidence base in hyperhidrosis. NHS pathway for moderate-to-severe primary hyperhidrosis includes topical aluminium chloride, oral anticholinergics, iontophoresis, and (for severe focal) botulinum toxin. Sage is not on this pathway; if your sweating significantly affects daily life, see your GP. [2]
Some evidenceLimitedPeople with undiagnosed sweating, palpitations, or hot-flush-like symptoms
Get a clinical assessment first. Hyperthyroidism, anxiety disorders, infection, and certain medications can produce flushing or sweating that is misattributed to menopause. Sage will not help those underlying causes. [5]
Popular, not provenInsufficient
How it works
Sage extract has multiple proposed mechanisms relevant to menopausal symptoms and sweating: weak oestrogen-receptor binding (driven mostly by flavonoid components), inhibition of acetylcholine breakdown (acetylcholinesterase inhibition — relevant to historic cognitive-function research), modulation of sweat-gland muscarinic signalling (relevant to hyperhidrosis), and antioxidant activity via rosmarinic / carnosic acids. The clinical translation of any single mechanism is incompletely characterised; the trial evidence is dose-and-preparation-specific.
Common myths
Myth"Sage essential oil and sage leaf extract are the same."
RealityThey are different preparations with different thujone content. Essential oil is a concentrated steam-distilled preparation with much higher thujone content than aqueous or hydroethanolic leaf extracts. The clinical-trial evidence for menopausal symptoms is on standardised leaf extract, not on essential oil. Sage essential oil should not be taken internally except under specialist guidance.
Myth"Sage is "natural HRT"."
RealitySage has no authorised UK health claim. The trial evidence is small and largely open-label, and effect sizes do not approach HRT effect sizes. Sage is an option to try alongside the full menopause-care pathway, not a replacement when HRT is clinically appropriate. [1]
Myth"Because sage is used in cooking it must be safe at any dose."
RealityCulinary use is a small daily exposure with low thujone content per serving. Concentrated supplemental extracts at sustained daily intake are a different exposure. The thujone ceiling in food / drink is set under retained EU food law for a reason. Supplement-grade extracts should disclose thujone content on the spec sheet.
Common online questions
Synthesised from the questions UK shoppers most often ask online about Sage (Salvia officinalis). Each answer is editorial and links to its evidence in the Sources list below.
How long until sage works for hot flushes?
Trials report effects appearing by weeks 4 to 8 of daily use at standardised-extract doses. If you don''t see meaningful change after 8 weeks, sage is unlikely to be the right tool for you — talk to your GP about the broader menopause-care pathway including HRT and non-hormonal prescription options. [3,1]
Can I take sage with HRT?
Talk to your prescriber. There is no documented major interaction with HRT, but combined endocrine effects in an individual taking both have not been formally studied. If you''re on HRT and adding sage, your prescriber should know.
Is sage safe in pregnancy?
Avoid. Sage has traditional emmenagogue (menstruation-stimulating) and uterine-stimulating use; thujone and other constituents cross the placenta. Sage is also reported to suppress lactation, so should be avoided when breastfeeding too unless specifically indicated for weaning. [6]
Why does the label say to talk to a GP if I have epilepsy?
Sage essential oil contains thujone, a GABA-A antagonist associated with seizures at high doses. Standardised leaf extracts have much lower thujone than the essential oil, but a precautionary stance is appropriate for anyone with a seizure disorder or on antiepileptic medication.
⚖️ The official position
What may lawfully be claimed about Sage (Salvia officinalis) in Great Britain. This is a regulatory position, not an evidence grade.
No health claim is authorised for this use in Great Britain.
Sage (Salvia officinalis) has a history of traditional use. Authorised health claims require a positive EFSA scientific opinion; none has been issued for this use.
🔬 Camden’s evidence review
The research Camden reviewed, graded on its strength. This is our own appraisal — it sits beneath the official guidance above, never above it.
Menopausal hot flushes / vasomotor symptoms
LimitedEvidencelimitedBommer 2011 (PMID 21630133) is the most-cited supportive trial: an open-label multicentre study in 71 women, 280 mg/day of a standardised fresh-leaf extract, ~50 % reduction in hot flush severity over 8 weeks. The trial is open-label rather than blinded, and the placebo response in menopausal hot flushes is well-documented to be substantial (30–40 %), so the true effect attributable to sage is uncertain. Smaller subsequent randomised trials (Dadfar 2019, Zeidabadi 2019) report similar direction. Evidence is suggestive, not strong. [3]
Hyperhidrosis (excess sweating)
LimitedEvidencelimitedSmall trials report modest reductions in sweating with sage leaf extract; not on the UK NHS pathway for clinically significant hyperhidrosis. [2]
Cognitive function in healthy adults
LimitedEvidencelimitedOlder small trials (Tildesley / Scholey, 2003–2008) reported acute cognitive effects of sage extract on memory and mood in healthy adults. Effect sizes are modest and not consistently replicated. Not relevant to a menopause-context label.
Type-2 diabetes / glycaemic control
LimitedEvidencelimitedSmall trials report modest reductions in fasting glucose and lipid markers with sage leaf extract. Not on UK diabetes guidance pathways.
Safety
Sage leaf extract is generally well tolerated at typical food-supplement doses for short-to-medium-term use. Principal safety concerns are thujone (concentrated in essential oil; lower in leaf extract), liver enzyme effects at high doses, and pregnancy / breastfeeding contraindications. Talk to a clinician before use if you have epilepsy, liver disease, or take diabetes / sedative / anticonvulsant medication.
Talk to your pharmacist or GP first if you:
- You are pregnant, breastfeeding, or trying to conceive — avoid.
- You have epilepsy or take antiepileptic medication.
- You have liver disease or take medication metabolised in the liver.
- You take diabetes medication — sage may modestly lower blood glucose.
- You take sedative or sleep medication — additive sedation is theoretical.
- You are giving to a child — paediatric use is not standard.
- Your hot flushes are severe / affecting daily life — talk to your GP about the fuller menopause-care pathway.
Common side effects: Mild GI symptoms; dry mouth at higher doses. Allergic reactions in Lamiaceae-family-allergic individuals.
Pregnancy and breastfeeding
Traditional emmenagogue / uterine-stimulant use; thujone crosses placenta. Avoid.
Sage may suppress lactation; only used intentionally for weaning under guidance.
Talk to your GP, midwife, or pharmacist before starting any supplement during pregnancy or breastfeeding.
More clinical detail (for clinicians and informed readers)
Contraindications
- Pregnancy.
- Breastfeeding (sage may suppress lactation).
- Active epilepsy or seizure disorder.
- Active liver disease.
- Known Lamiaceae (mint family) allergy.
Drug interactions
- Antiepileptics — theoretical thujone-related seizure risk and additive metabolic effects.
- Sedatives / hypnotics — theoretical additive sedation.
- Diabetes medication — sage may lower glucose; monitor.
- Hepatotoxic medications — theoretical additive liver-enzyme effects at high sage doses.
This is not an exhaustive list. Always tell your prescriber and pharmacist about every supplement you take.
Common side effects
- Mild GI symptoms — nausea, dry mouth.
Rare side effects
- Hepatotoxicity — case reports at high chronic doses.
- Seizures — rare reports associated with sage essential oil ingestion (high thujone).
- Allergic reactions in Lamiaceae-allergic individuals.
How to take it
- Typical supplemental range
- The Bommer 2011 trial dose was 280 mg/day fresh-leaf-equivalent of a standardised extract for 8 weeks. UK supplement labels commonly use 200–600 mg/day.
- Timing
- No specific timing requirement.
How to spot quality
Look for
- Salvia officinalis named — the common Dalmatian sage species used in trials. Spanish sage (Salvia lavandulifolia) and Greek sage (Salvia fruticosa) are different species.
- Leaf extract specified — not essential oil — and extraction method named (aqueous, hydroethanolic).
- Thujone content disclosed (mg per serving or as a maximum %). The responsible standard.
- Standardisation marker stated — typically rosmarinic acid % — and dose declared as fresh-leaf or dry-leaf equivalent.
- GMP-certified manufacture.
Red flags
- Generic "sage" without species named.
- No thujone disclosure.
- Sage essential oil sold for internal use without specialist supervision.
- Marketing implies "natural HRT" or oestrogen-replacement effect.
Commonly combined with
Other ingredients that share a biological pathway, cofactor relationship, or evidence-backed protocol with this one. Mechanisms below cite primary physiology — not folk pairing. Doses are literature ranges, not recommendations. Talk to your pharmacist or GP before changing your stack, especially if you take prescription medication.
Soy Isoflavones (Genistein, Daidzein, Glycitein)
Limited evidenceMenopause-cluster pairing — both feature in menopausal hot-flush product positioning.
Sage thujone + rosmarinic acid modulate sweat / hot-flush mechanism (Bommer 2011 trial); soy isoflavones provide phytoestrogen support. Mechanism complementary across cholinergic + estrogenic axes.
Evidence: Camden soy-isoflavones covers menopause cluster + oncology safety pivot.
Doses studied: 300 mg sage extract + 40-80 mg soy isoflavones daily.
Evening Primrose Oil (Oenothera biennis)
Insufficient evidenceMenopause-cluster pairing — sage hot-flush + evening primrose oil GLA supportive context.
Sage cholinergic / hot-flush mechanism; evening primrose oil GLA. Different mechanisms; both feature in menopausal symptom marketing despite mixed UK trial evidence.
Evidence: Camden evening-primrose-oil covers UK MHRA Epogam withdrawal context.
Doses studied: 300 mg sage + 1000-2000 mg EPO daily.
Hops (Humulus lupulus)
Insufficient evidenceMenopause + sleep cluster overlap — sage hot-flush + hops 8-PN phytoestrogen + sleep adjunct.
Sage thujone + hops 8-prenylnaringenin (most-potent phytoestrogen) — different phytoestrogen / cholinergic mechanisms.
Evidence: Camden hops covers cluster.
Doses studied: 300 mg sage + 60-200 mg hops daily.