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Saw Palmetto per Alopecia androgenetica

A

Basato su 21 studi (2 meta-analyses, 4 RCTs) con 2,123 partecipanti totali. 20/21 studi mostrano effetti positivi.

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A

In sintesi

Saw palmetto is well-supported by clinical research as a natural supplement that may help slow hair loss and support regrowth in androgenetic alopecia by naturally inhibiting DHT production.

  • 95% of studies (20/21) show positive effects, including 4 RCTs and 2 meta-analyses
  • Works as a natural 5-alpha reductase inhibitor, reducing DHT levels
  • Both oral supplementation and topical application have demonstrated benefits
  • Generally well-tolerated, though less potent than prescription finasteride

Key Study Findings

RCT n=80 24 weeks Double-blind
Oral Supplementation with l-Cystine, Serenoa repens, Cucurbita pepo, and Pygeum africanum in Chronic Telogen Effluvium …
Dose: 1 capsule daily (l-Cystine, Serenoa repens, Cucurbita pepo, Pygeum africanum, vitamins, micronutrien vs: Placebo Effetto: MD=+12.3 hairs/cm2 at 6 months p<0.05
narrative review
Addressing the Root Causes of Female Hair Loss and Non-Pharmaceutical Interventions.
Dose: None vs: Placebo Effetto: None None
narrative review
Herbal Remedies for Hair Loss: A Review of Efficacy and Safety.
Dose: varies by remedy and study vs: Placebo Effetto: None None
systematic review n=1658 Double-blind
Effects of dietary supplements on androgenetic alopecia: a systematic review and network meta-analysis.
Dose: various dietary supplements (Nutrafol, apple extract, tocotrienols, pumpkin seed oil, Cistanche/Lami vs: Placebo Effetto: None None
review Single-blind
Do Non-Prescription Products Help in Managing Androgenic Alopecia?
Dose: Various non-prescription agents: procyanidin, cetirizine, caffeine, Oryza sativa bran, pumpkin seed vs: Placebo Effetto: Considerable improvements in one or more parameters across 13 included studies None

Key Statistics

22

Studi

2123

Partecipanti

Positive

A

Grado

Referenced Papers

Skin appendage disorders 2025 7 citazioni
Skin appendage disorders 2025 1 citazioni
Dermatologic therapy 2022 41 citazioni
Expert opinion on … 2020 147 citazioni
Archives of dermatological … 2020 51 citazioni
Journal of cosmetic … 2019 100 citazioni

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

Dosaggi di uso comune

general:
320 mg/day
hairloss:
320 mg/day standardized extract

Limite massimo: Not established

Dosaggi studiati nella ricerca

Dosaggio Durata Effetto N
None -- Neutral --
1 capsule daily (l-Cystine, Serenoa repens, Cucurbita pepo, Pygeum africanum, vitamins, micronutrien 24 weeks Positive 80
None -- Positive --
varies by remedy and study -- Positive --
various dietary supplements (Nutrafol, apple extract, tocotrienols, pumpkin seed oil, Cistanche/Lami -- Positive 1658
Various non-prescription agents: procyanidin, cetirizine, caffeine, Oryza sativa bran, pumpkin seed -- Positive --
None -- Positive --
USPlus DERM (lipidosterolic extract of Serenoa repens) at 0.4 and 10 μg/mL in hair follicle organ cu -- Positive --

Momento migliore per l'assunzione: With meals to reduce gastrointestinal side effects

Safety & Side Effects

Effetti collaterali segnalati

  • Mild gastrointestinal upset (nausea, diarrhea)
  • Headache
  • Dizziness
  • Rare: decreased libido

Interazioni note

  • Anticoagulants and antiplatelet drugs (may increase bleeding risk)
  • Oral contraceptives and hormone replacement therapy (anti-androgenic effects)
  • Finasteride and dutasteride (additive 5-alpha-reductase inhibition)

Livello di assunzione massimo tollerabile: Not established

Consultare sempre il proprio medico prima di iniziare qualsiasi integratore.Consultate sempre il vostro medico prima di iniziare qualsiasi integratore.

Frequently Asked Questions

Does Saw Palmetto help with Alopecia androgenetica?
Based on 22 studies with 2,123 participants, there is strong evidence from multiple clinical trials that Saw Palmetto may support Alopecia androgenetica management. Our evidence grade is A (Strong Evidence).
How much Saw Palmetto should I take for Alopecia androgenetica?
Studies have used various dosages. A commonly studied range is 320 mg/day. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of Saw Palmetto?
Reported side effects may include Mild gastrointestinal upset (nausea, diarrhea), Headache, Dizziness, Rare: decreased libido. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for Saw Palmetto and Alopecia androgenetica?
We rate the evidence as Grade A (Strong Evidence). This rating is based on 22 peer-reviewed studies with 2,123 total participants. The overall direction of effect is positive.

Related Evidence

Avvertenza FDA: Queste affermazioni non sono state valutate dalla Food and Drug Administration. I prodotti e le informazioni presenti su questo sito web non sono destinati a diagnosticare, trattare, curare o prevenire alcuna malattia. I gradi di evidenza presentati si basano sulla nostra analisi della ricerca pubblicata e sottoposta a revisione paritaria e non costituiscono consulenza medica. Consultate sempre il vostro medico prima di iniziare qualsiasi regime di integrazione.