Salvia officinalis and PCOS – New hope through traditional medicinal plant

Polycystic ovary syndrome (PCOS) is the most common hormonal disorder in women of reproductive age and is estimated to affect 5–15% of all women worldwide. The disease goes far beyond menstrual irregularities – it is associated with serious metabolic complications such as lipid metabolism disorders, insulin resistance, and increased oxidative stress. This is precisely where a current wave of research comes in: Two clinical studies from 2025/2026 show that sage (Salvia officinalis) can significantly improve both metabolism and fertility in PCOS patients. An ancient medicinal plant is thus moving into the focus of modern PCOS therapy.

What is PCOS and why is sage interesting?

PCOS is a complex endocrine disorder characterized by three main features: irregular or absent menstrual cycles (oligo- or amenorrhea), clinical or biochemical signs of elevated male hormones (hyperandrogenemia), and the characteristic appearance of many small follicles on ultrasound. .

The metabolic complications are particularly insidious. Regardless of body weight or ethnicity, many PCOS patients suffer from dyslipidemia – a disorder of lipid metabolism with elevated triglycerides and LDL cholesterol, and reduced HDL cholesterol. This lipid metabolism disorder not only contributes to an increased cardiovascular risk, but also directly impairs fertility: it affects egg maturation, embryo quality, and the receptivity of the uterine lining. .

This is compounded by a vicious cycle of oxidative stress and metabolic disorders . Elevated levels of reactive oxygen species worsen insulin resistance, promote inflammation, and damage ovarian cells. Simultaneously, insulin resistance and lipid metabolism disorders exacerbate oxidative stress—a self-reinforcing system. .

This is where sage comes in. Salvia officinalis contains a complex spectrum of active ingredients including carnosic acid, rosmarinic acid, diterpenoids, triterpenoids, flavonoids, and phenolic glycosides. These substances have an effect:

• Antihyperlipidemic : They lower elevated blood lipids.

• Metabolism-regulating : They inhibit enzymes such as α-glucosidase and α-amylase, thus improving blood sugar control.

• Antioxidant : They neutralize free radicals

• Anti-inflammatory : They reduce inflammatory processes

Particularly interesting: Sage acts as an agonist of the peroxisome proliferator-activated receptor γ (PPARγ) PPARγ is a key switch in fat metabolism and insulin sensitivity – precisely the areas that are out of balance in PCOS.

Current research 2025/2026

Study 1: Sage improves fat metabolism and reduces oxidative stress

The first and methodologically sound study was published in March 2025 in the renowned journal BMC Complementary Medicine and Therapies. This is a randomized, placebo-controlled clinical trial with 70 Iranian women aged 15–40 years who had been newly diagnosed with PCOS according to the Rotterdam criteria.

Study design

The participants received either one of the following daily for eight weeks:

• 330 mg sage extract (ethanolic extract from the above-ground parts of the plant) or

• Placebo (pure cornstarch)

Comprehensive lipid profiles and markers for oxidative stress were determined before and after the intervention. .

Results – Lipid metabolism

The study found significant improvements in fat metabolism. :

Of particular note is the significant reduction in triglycerides – a key risk factor for cardiovascular disease in PCOS. A post-hoc analysis, taking age and BMI into account, also revealed significant effects on HDL cholesterol and the triglyceride-to-HDL cholesterol ratio. .

Results – Oxidative Stress

Even more impressive were the effects on oxidative stress. :

• Malondialdehyde (MDA) – a marker for oxidative damage: In the sage group, the value decreased by -4.72 μM , in the placebo group only by -0.41 μM (p = 0.000)

• Total antioxidant capacity (TAC) – the body's ability to combat oxidative stress: In the sage group it increased by +0.006 , in the placebo group it decreased by -0.007 (p = 0.02)

The authors conclude: "The study shows that S. officinalis extract can significantly lower triglyceride levels and oxidative stress in patients with PCOS. This suggests its potential as a complementary natural therapy for treating metabolic and oxidative imbalances associated with this condition." .

Study 2: Sage improves fertility outcomes in PCOS patients

While the first study focused on metabolism, a second clinical study from Iraq, published in June 2025 in the Journal Ginekologia i Poloznictwo , investigated whether sage could also improve the fertility of PCOS patients. .

Study design

This study included 461 women with PCOS who were planning to undergo intrauterine insemination (IUI). They were randomly assigned to two groups. :

• Group A : 500 mg sage leaf extract daily for 8 weeks before IUI

• Group B : Placebo over the same period

A total of 400 IUI cycles were evaluated (200 per group). .

Results

The results are remarkable:

• The number of dominant follicles was significantly higher in the sage group (p = 0.003)

• The endometrial thickness (uterine lining) was significantly improved (p = 0.008)

• The estradiol (E2) level was significantly elevated (p = 0.002)

• The clinical pregnancy rate was significantly higher in the sage group (p = 0.0274)

• The live birth rate also improved significantly (p = 0.0274).

The authors conclude: "Salvia officinalis extract can improve the clinical pregnancy rate and the live birth rate in ovulatory PCOS patients undergoing IUI" .

An overview of the mechanisms of action

How can this astonishing effect be explained? Research identifies several possible explanations:

1. Inhibition of fat-splitting enzymes
Sage components inhibit pancreatic lipase – an enzyme that breaks down fats in the intestine. As a result, less fat is absorbed, and blood lipids decrease .

2. PPARγ activation
By activating PPARγ, sage improves the ratio of HDL to LDL and reduces fatty tissue – a double benefit for PCOS treatment .

3. Antioxidant effect
The polyphenolic compounds neutralize free radicals and thus reduce oxidative stress, which damages egg cells and metabolism alike .

4. Improvement of insulin sensitivity
An earlier publication by the same research group showed that sage extract also improves glycemic control and can prevent insulin resistance in PCOS patients .

5. Promotion of follicle maturation
The Iraqi study suggests that sage directly improves follicle maturation and the quality of the uterine lining – possibly via modulation of hormone levels .

Practical classification and outlook

What do these results mean in practice?

Sage as a complementary therapy option
Both studies emphasize that sage extract represents a promising natural intervention for the prevention and treatment of metabolic disorders associated with PCOS . The authors of the metabolic study state: "In summary, this study contributes to the growing body of evidence that S. officinalis has a positive effect on lipid profiles and OS markers, and thus represents a promising natural intervention for the prevention and treatment of metabolic disorders associated with PCOS . "

Dosages used
The following dosages were used in the studies:

• For improved metabolism: 330 mg sage extract daily for 8 weeks

• For fertility support: 500 mg sage leaf extract daily for 8 weeks before IUI.

Limitations and Outlook
The authors themselves point out limitations:

• The study duration of 8 weeks is relatively short.

• Only certain dosages were tested.

• Long-term effects have not yet been studied.

• Further studies with larger samples and different dosages, as well as hormonal analyses, are needed.

Conclusion

Current research from 2025 and 2026 provides, for the first time, high-quality clinical evidence for the efficacy of sage in PCOS. The randomized, placebo-controlled study from Iran shows significant improvements in triglyceride levels and oxidative stress . Furthermore, the Iraqi fertility study demonstrates improved pregnancy and live birth rates in PCOS patients after sage use .

This makes sage one of the most promising medicinal plants for polycystic ovary syndrome (PCOS) – with effects on two key levels simultaneously: metabolic syndrome and fertility. While further studies on long-term efficacy and optimal dosage are needed, it is already becoming clear that this ancient herb could find a permanent place in modern PCOS therapy.

Official sources & studies:

• Maleki-Hajiagha A et al.: Exploring the therapeutic impact of Salvia officinalis on lipid and oxidative stress markers in patients with polycystic ovary syndrome - a randomized placebo-controlled clinical trial (BMC Complementary Medicine and Therapies, March 2025) - SpringerLink

• Sage supports fat metabolism in PCOS (German Health Portal, August 2025)

• Sage extract as a possible support for PCOS (PharmaNow, August 2025)

• Sage improves blood lipid levels in PCOS (German Health Portal, September 2025)

• Sage improves blood lipid levels in PCOS (MedWiss.Online, September 2025)

• Hameed EA et al.: Oral intake of Salvia officinalis improves intrauterine insemination outcomes in women with polycystic ovary syndrome (Ginekologia i Poloznictwo, June 2025)