Herb

Pollen Extract

Standardised extract of grass and flower pollens (rye grass, Secale cereale; maize; Scots pine)

TL;DR

Pollen extract is a standardised extract of plant pollen, not bee pollen. Placebo-controlled trials support it modestly for chronic prostatitis pain; evidence for hot flashes is weak, and a menopause guideline does not recommend it.

Ideal For

Men with chronic prostatitis/pelvic pain syndrome, alongside their urologist's treatment
Men with mild BPH symptoms who have had a medical assessment

Avoid If

You are allergic to pollen extract products
You are pregnant or breastfeeding, as safety has not been studied
You want it to replace treatments with stronger evidence for hot flashes

Frequently Asked Questions

What is pollen extract?

Pollen extract is a standardised extract of plant pollen, such as rye grass, maize and pine pollen, made into tablets or capsules. It is not the same as bee pollen granules, which are collected by bees, and different products were tested for different problems: rye grass extracts for prostate symptoms and a Swedish pollen and pistil formula for menopause.

Does pollen extract help chronic prostatitis?

Probably, modestly. In a 12-week placebo-controlled trial of 139 men with inflammatory chronic prostatitis/chronic pelvic pain syndrome, rye grass pollen extract improved pain, quality of life and total symptoms, and 70.6% responded compared with 50.0% on placebo. The AUA's 2025 guideline says clinicians may prescribe it, as a conditional recommendation.

Does flower pollen extract shrink the prostate?

Not in controlled trials. A systematic review of four BPH trials found rye grass pollen extract modestly improved self-rated urinary symptoms and night-time urination but did not change prostate size or urine flow. One uncontrolled study reported a smaller prostate only in 28 men treated for over a year.

Does pollen extract work for hot flashes?

The evidence is weak. One placebo-controlled trial of 64 women found more responders on the extract (65% vs 38%), but a 2024 meta-analysis found no significant benefit when only controlled studies were pooled, and the North American Menopause Society does not recommend it. Hormone therapy and several non-hormonal prescriptions have much stronger support.

Is pollen extract safe after breast cancer?

Laboratory studies found no estrogenic effect and no inhibition of CYP2D6, the enzyme tamoxifen relies on, and a small trial in 39 breast cancer survivors reported it was well tolerated. That is limited evidence, so agree any supplement with your oncologist first.

Is pollen extract the same as bee pollen?

No. Bee pollen is pollen gathered by bees and sold as granules, while pollen extracts are standardised products made from plant pollen. The positive prostate and menopause trials used extracts, so their results should not be assumed for bee pollen, or for pine pollen powders, which were not tested in these trials.

Is flower pollen extract safe?

In trials it was well tolerated: adverse events were minor in a 139-man prostatitis trial, withdrawals in BPH trials were 4.8% compared with 2.7% on placebo, and a 2024 meta-analysis of menopause studies found no significant adverse effects. There are no safety data for pregnancy or breastfeeding, and allergy outcomes weren't reported separately, so ask a clinician first if you have pollen allergies.

Overview

Pollen extract is a standardised extract made from the pollen of plants such as rye grass (Secale cereale), maize and Scots pine, rather than pollen collected by bees. It is sold under names including flower pollen extract, rye grass pollen extract and purified cytoplasm of pollen, and the tested products differ. Rye grass extracts such as Cernilton were studied for prostate problems; a Swedish pollen and pistil extract (PI 82 with GC Fem), sold as Femal, Relizen and Sérélys and branded as PureCyTonin, was studied for menopausal symptoms. Results from one of these products can't be assumed for the other, or for bee pollen granules or pine pollen powders.

The strongest evidence is for chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS). In a placebo-controlled trial of 139 men with the inflammatory form, rye grass pollen extract taken for 12 weeks improved pain, quality of life and total symptom scores, and 70.6% responded compared with 50.0% on placebo. Smaller trials against placebo, ibuprofen and tadalafil point the same way, and the American Urological Association's 2025 guideline says clinicians may prescribe it, a conditional recommendation. For benign prostatic hyperplasia (BPH), a systematic review of four short trials found modest improvement in self-rated urinary symptoms and night-time urination, but no change in urine flow or prostate size.

For menopausal hot flashes, one placebo-controlled trial of 64 women found fewer hot flushes on the Swedish formula, and uncontrolled studies report large improvements. But a 2024 meta-analysis found no significant benefit when only the controlled studies were pooled, and the North American Menopause Society's 2023 position statement does not recommend pollen extract (Level III). Laboratory tests found no estrogenic effect and no inhibition of CYP2D6, the enzyme tamoxifen depends on, which is why it is promoted to women after breast cancer; one small trial in 39 breast cancer survivors has been published.

Side effects in trials were minor and uncommon. There are no safety data for pregnancy or breastfeeding, and the trials we found did not report results separately for people with pollen allergies.

How It Works

Laboratory analysis found only low, sub-effective amounts of phytoestrogens in the Swedish menopause formula, and high doses caused no uterine growth in immature rats, suggesting no estrogenic action.
In a laboratory test with human liver enzymes, purified Swedish pollen extract did not inhibit CYP2D6, the enzyme that converts tamoxifen to its active metabolites.
Researchers working on the purified cytoplasmic extract describe it as an SSRI-like therapy; this is a proposed mechanism, not an established one.
Preclinical studies of pollen extract in prostatitis report anti-inflammatory and anti-proliferative effects.
In one trial, seminal IL-8, an inflammatory messenger, fell from 878 to 298 pg/mL over 3 months in men taking pollen extract with vitamins (vs 736 pg/mL on bromelain); with a combination product and no placebo, this can't be credited to the extract alone.
The pollen-pistil component of the menopause formula contains high levels of the antioxidant enzyme superoxide dismutase, which one study suggests may play a role.

Quick Facts

Plant pollen extract, not bee pollen
Best evidence: chronic prostatitis/pelvic pain
Main trial: 70.6% vs 50.0% responders
AUA 2025: may be prescribed (conditional)
Hot flashes: NAMS 2023 does not recommend
Side effects minor in trials

Benefits & Outcomes

No linked outcomes yet. Research is ongoing.

Health Concerns Addressed

Prostatitis

Likely eases pain and improves quality of life in chronic prostatitis/pelvic pain syndrome, with modest effects from short trials.

BPH (Benign Prostatic Hyperplasia)

Small, older trials show modest relief of symptoms and nocturia, but no change in urine flow, residual urine or prostate size.

Hot Flashes

symptom

Insufficient evidence

Limited

Effectiveness 2/5

One small positive trial, null pooled controlled data and a guideline against it: not enough to recommend.

Supporting Research
22 studies

A pollen extract (Cernilton) in patients with inflammatory chronic prostatitis-chronic pelvic pain syndrome: a multicentre, randomised, prospective, double-blind, placebo-controlled phase 3 study

Score: 8/10

2009

rct

n=139

Wagenlehner FM, Schneider H, Ludwig M +3 more

the pollen extract significantly improved total symptoms, pain, and QoL

Goal	Dose	Notes
Chronic prostatitis/pelvic pain syndrome	2 capsules of rye grass pollen extract every 8 hours	The regimen in the 12-week placebo-controlled trial of 139 men; the abstract does not give the capsule strength.
Benign prostatic hyperplasia (BPH)	126 mg three times a day (two 63 mg tablets)	From an uncontrolled study of 79 men treated for at least 12 weeks; controlled trials lasted 12 to 24 weeks.
Menopausal hot flashes	2 tablets of the Swedish pollen formula each morning	The regimen in the 3-month placebo-controlled trial; the North American Menopause Society does not recommend pollen extract.

Pollen Extract

Ideal For

Avoid If

Frequently Asked Questions

Overview

How It Works

Quick Facts

Benefits & Outcomes

Health Concerns Addressed

Prostatitis

BPH (Benign Prostatic Hyperplasia)

Hot Flashes

Supporting Research22 studies

A pollen extract (Cernilton) in patients with inflammatory chronic prostatitis-chronic pelvic pain syndrome: a multicentre, randomised, prospective, double-blind, placebo-controlled phase 3 study

Femal, a herbal remedy made from pollen extracts, reduces hot flushes and improves quality of life in menopausal women: a randomized, placebo-controlled, parallel study

The efficacy of purified pollen extract for reducing vasomotor symptoms in women: a systematic review and meta-analysis

Treatment of outflow tract obstruction due to benign prostatic hyperplasia with the pollen extract, cernilton. A double-blind, placebo-controlled study

Therapeutic efficacy of orally administered pollen for nonallergic diseases: An umbrella review

A systematic review of Cernilton for the treatment of benign prostatic hyperplasia

[Clinical evaluation of the effect of tamsulosin hydrochloride and cernitin pollen extract on urinary disturbance associated with benign prostatic hyperplasia in a multicentered study]

The role of flower pollen extract in managing patients affected by chronic prostatitis/chronic pelvic pain syndrome: a comprehensive analysis of all published clinical trials

A prospective, multicenter, randomized, double-blind placebo-controlled trial on purified and specific Cytoplasmic pollen extract for hot flashes in breast cancer survivors

[A comparative study on different doses of cernilton for preventing the clinical progression of benign prostatic hyperplasia]

[Clinical evaluation of Cernilton on benign prostatic hypertrophy--a multiple center double-blind study with Paraprost]

Effects of pollen extract preparation Prostat/Poltit on lower urinary tract symptoms in patients with chronic nonbacterial prostatitis/chronic pelvic pain syndrome: a randomized, double-blind, placebo-controlled study

Pollen extract in association with vitamins provides early pain relief in patients affected by chronic prostatitis/chronic pelvic pain syndrome

Comparison of cernitin pollen extract vs tadalafil therapy for refractory chronic prostatitis/chronic pelvic pain syndrome: A randomized, prospective study

Therapeutic efficacy of Cernilton in benign prostatic hyperplasia patients with histological prostatitis after transurethral resection of the prostate

Prospective observational study to evaluate the efficacy and safety of the pollen extract Sérélys® in the management of women with menopausal symptoms

The benefits of purified cytoplasm of pollen in reducing menopausal symptoms in peri- and post-menopause: an Italian multicenter prospective observational study

The Clinical Efficacy of Pollen Extract and Vitamins on Chronic Prostatitis/Chronic Pelvic Pain Syndrome Is Linked to a Decrease in the Pro-Inflammatory Cytokine Interleukin-8

Eviprostat has an identical effect compared to pollen extract (Cernilton) in patients with chronic prostatitis/chronic pelvic pain syndrome: a randomized, prospective study

Clinical evaluation of long-term treatment using cernitin pollen extract in patients with benign prostatic hyperplasia

Results of treatment with pollen extract (Cernilton N) in chronic prostatitis and prostatodynia

Non-hormonal Treatments For Menopausal Symptoms and Sleep Disturbances: A Comparison Between Purified Pollen Extracts and Soy Isoflavones

Safety Information

Potential Side Effects

Contraindications

Drug Interactions

Pregnancy & Breastfeeding

Dosage Guidelines

Dosing by Goal

Forms Compared

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Medical Disclaimer

Supporting Research
22 studies