
Saw palmetto, pumpkin seed & nettle - three classic plants for men
- Saw palmetto (Serenoa repens) is a low-growing fan palm of the palm family (Arecaceae), native to the south-eastern USA. Its dark, oil-rich berries are used - their key constituents are phytosterols such as beta-sitosterol and free fatty acids.
- The field pumpkin (Cucurbita pepo) belongs to the gourd family (Cucurbitaceae) and originally comes from Central America. Besides phytosterols, its seeds provide proteins, amino acids and lignans; the European Pharmacopoeia standard refers to the variety styriaca (Styrian oil pumpkin).
- The trio is completed by nettle leaf (Urtica dioica, contains 1% silicon dioxide) and tomato fruit extract (Lycopersicon esculentum) with 10% lycopene - a red carotenoid that gives tomatoes their colour.
Prostanorm uses saw palmetto extract 5:1 - standardised instead of anonymous powder
- Green Naturals Prostanorm contains saw palmetto fruit extract 5:1 with a defined 5% phytosterols (15 mg per daily dose) - compared to many manufacturers who use ground fruit powder without declaring its key constituents.
- All four plant extracts are declared with their extraction ratio or key constituent: 600 mg pumpkin seed extract 4:1, 15 mg lycopene from 150 mg tomato extract and 1.3 mg silicon dioxide from 130 mg nettle leaf extract - compared to many complexes that only state total amounts without standardisation.
- How strongly the extraction process determines the composition of saw palmetto extracts has been examined in a review (De Monte et al., 2014); the constituents of hydrophilic pumpkin seed extracts from ten European cultivars were analysed in 2025 (Grasu et al., 2025).
Plus zinc, selenium & vitamin E - with proven benefits
- Zinc contributes to the maintenance of normal testosterone levels in the blood and to normal fertility and reproduction. Selenium contributes to normal spermatogenesis (authorised EFSA claims).
- Zinc, selenium and vitamin E contribute to the protection of cells from oxidative stress - per daily dose with 5 mg zinc (50% NRV), 50 µg selenium (91% NRV) and 3.9 mg vitamin E (33% NRV), sensibly dosed rather than overdosed.
- 90 vegan capsules per pack last 30 days at 3 capsules daily - a clear one-month supply.
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Best time to take
Take 3 capsules daily, swallowed whole with sufficient water, ideally with a meal. The capsules can also be spread over the day - what matters is regular daily intake.
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Dosage and duration of use
Daily dose: 3 capsules (= 600 mg pumpkin seed extract, 300 mg saw palmetto fruit extract with 15 mg phytosterols, 150 mg tomato extract with 15 mg lycopene, 130 mg nettle leaf extract, 5 mg zinc, 50 µg selenium and 3.9 mg vitamin E). The pack of 90 capsules lasts 30 days. For adults only; not suitable for pregnant women, children or adolescents. Do not take any other food supplements containing zinc or selenium.
| Quality criterion | Green Naturals® | Other manufacturers |
|---|---|---|
| Raw material & standardisation | ✔ saw palmetto extract 5:1 with 5% phytosterols (15 mg/day) | ✕ |
| Transparent declaration | ✔ all 4 plant extracts with extraction ratio or key constituent | ✕ |
| Sensible dosage | ✔ 600 mg pumpkin seed + 300 mg saw palmetto extract per daily dose | ✕ |
| Proven benefit (EFSA) | ✔ zinc & selenium with authorised claims (testosterone, spermatogenesis) | ✕ |
| Purity & lab testing | ✔ made in Germany, every batch lab-tested | ✕ |
| Formula & tolerability | ✔ vegan HPMC capsule, no colourings, lactose- & gluten-free | ✕ |
| Transparency & responsibility | ✔ clear notes on zinc/selenium combination & age limit | ✕ |
| Practicality | ✔ 3 capsules daily, 90 capsules = 30 days | ✕ |
Our vision at Green Label® is to create products based on purity and transparency. Our approach is to source high-quality raw materials directly from leading producers worldwide to offer a product that is uncompromisingly committed to natural ingredients. Every capsule of our products carries the promise of purity, sustainability, and maximum effectiveness:
- Premium active ingredients as pure substances, directly from leading producers.
- Production and bottling under the highest pharmaceutical standards (GMP, ISO 22000:2018, HACCP).
- Maximum avoidance of all additives; only valuable natural substances are used.
- Vegan capsule shells, 100% free of PEG and other undesirable substances.
- Packaging in environmentally friendly, non-toxic materials for optimal aroma protection.
My name is Dr. Hari Sven Krishnan, founder of Heilpflanzenwohl GmbH and chief pharmacist.
Together with an experienced team of specialists, including Stephan Walz (pharmacist), Marie Schröder (nutritional scientist), and Dr. Christiane Gras (immunologist), we developed Green Naturals.
The result of intensive research with a clear goal: to offer you natural, highly effective products. At Heilpflanzenwohl, quality and purity come first, because we are convinced: "The best medicine comes from nature – we just need to learn how to use it correctly."
What is saw palmetto?
What is saw palmetto good for?
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Why combine saw palmetto and pumpkin seed?
What is lycopene?
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When should I take Prostanorm?
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Who should not take Prostanorm?
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Sources
- De Monte, C., Carradori, S., Granese, A., Di Pierro, G.B., Leonardo, C. & De Nunzio, C. (2014). Modern extraction techniques and their impact on the pharmacological profile of Serenoa repens extracts for the treatment of lower urinary tract symptoms. BMC Urology, 14, 63. DOI: 10.1186/1471-2490-14-63
- Grasu, A.-E., Senn, R., Halbsguth, C., Schenk, A., Butterweck, V. & Miron, A. (2025). Profiling Hydrophilic Cucurbita pepo Seed Extracts: A Study of European Cultivar Variability. Plants, 14(15), 2308. DOI: 10.3390/plants14152308
- Commission Regulation (EU) No 432/2012 of 16 May 2012 establishing a list of permitted health claims made on foods, other than those referring to the reduction of disease risk and to children's development and health. Official Journal of the European Union, L 136.
Remarks
- HACCP (Hazard Analysis and Critical Control Points) is a preventive system for ensuring food safety that identifies and assesses potential hazards in production and minimizes them through targeted control measures. The seal refers to the manufacturing process.
- This is how the grade is calculated: Grade calculation based on star ratings: 5.00 - 4.50 Very good, 4.49 - 3.50 Good, 3.49 - 2.50 Satisfactory, 2.49 - 1.50 Sufficient, 1.49 - 1.00 Poor. For the verification of ratings, no authenticity check of customer reviews is carried out. The ratings are combined from different sources, such as mail-order pharmacies and online marketplaces. Last updated: 27.10.26