✓
No active regulatory warnings
Sources: FDA MedWatch, EMA EudraVigilance, WHO VigiBase, WADA Prohibited List · 2026-05-29
Updated: 2026-05-29 · v2.0 · Prof. G. Pkhakadze, MD, MPH, PhD📎 Cite 📄 PDF
1 Identity

Saw Palmetto + Biotin

Serenoa repens + D-Biotin (hair formula)
Generally SafeEvidence: LimitedOther
Saw palmetto + biotin is a common combination product marketed for hair loss, combining saw palmetto (5α-reductase inhibitor, traditionally used for BPH) with biotin (B vitamin involved in keratin synthesis) [1]. The rationale: saw palmetto's anti-androgenic activity + biotin's keratin support may address both hormonal and nutritional aspects of hair thinning. Evidence is limited to small studies of combination products; no RCTs have isolated the specific contribution of this particular pairing [1].
1
Saw Palmetto + Biotin
Serenoa repens + D-Biotin (hair formula)
Generally SafeEvidence: LimitedOther
Clinical verdict: Saw palmetto + biotin is a popular hair-loss combination with plausible but unproven synergy. Saw palmetto's 5α-reductase inhibition is proven for BPH, not hair loss (limited hair data). Biotin deficiency causes hair loss but supplementation only helps if deficient (rare in healthy adults). The combination hasn't been studied as a specific pair [1].
RDA
Typical 320 mg SP + 2,500–5,000 mcg biotin
Target range
N/A
Upper limit
No UL
Evidence
Limited
Population dosing — click to filter
✅ USP Verified, NSF Contents Certified, ConsumerLab Approved
2 Risk self-assessment
Not applicable [1].
Select factors above to see your risk level
Clinical pearl for practitioners
SupplementIndex
Saw Palmetto + Biotin
Serenoa repens + D-Biotin (hair formula) · Generally Safe · Evidence: Limited
RDA
Typical 320 mg SP + 2,500–5,000 mcg biotin
Upper limit
No UL
Evidence
Limited
Clinical bottom line
Saw palmetto + biotin is a popular hair-loss combination with plausible but unproven synergy. Saw palmetto's 5α-reductase inhibition is proven for BPH, not hair loss (limited hair data). Biotin deficiency causes hair loss but supplementation only helps if deficient (rare in healthy adults). The combination hasn't been studied as a specific pair [1].
Do not miss
⚠ See overview for key clinical points [1]
Pregnancy
Consult healthcare provider [1].
4 Lab interpreter

See overview

<12 Deficient
12–20 Insufficient
20–50 Optimal
50–100 Excess
>150 Toxic
Your level:
Enter a value above
⚕ For healthcare professionals. Does not replace clinical judgment.
5 Quick facts
CategoryOther
Safety levelGenerally Safe
EvidenceLimited
RDATypical 320 mg SP + 2,500–5,000 mcg biotin
Upper limit (UL)No UL
Scientific nameSerenoa repens + D-Biotin (hair formula)
Category entrySee overview for key points [1]
6 Dosage by population

Adults Moderate

See product label

Elderly Moderate

See product label
Consider reduced renal/hepatic clearance. Start at lower end of range.

Pregnancy Moderate

See guidance
Consult healthcare provider [1].

Pediatric Moderate

See guidance
Per product guidance [1].

Athletes Limited

Standard dose

Obesity Limited

Standard dose
Fat-soluble compounds may require dose adjustment in obesity.

Renal Limited

Consult specialist
Dose adjustment may be needed in renal impairment.

Vegan Moderate

Standard dose
Per product label [1].
7 Form comparison
FormBioavailabilityVeganCost/day
['Various commercial forms', 'standard', 'See product labels [1].']StandardCheck label
8 Clinical evidence

Strong evidence

See overview [1]. HIGH

Moderate evidence

See overview [1]. MODERATE

Insufficient evidence

See overview [1]. LOW
9 Safety

🚩 Red flags — when to stop and refer

● See overview for safety concerns [1]

Pregnancy

Consult healthcare provider [1].

Pediatric

Per product guidance [1].
10 Toxicity and overdose

11 Drug interactions
See overview Variable
Mechanism: See overview [1].
Effect: See overview [1].
Action: See overview [1].
12 Supplement interactions
13 Laboratory monitoring
See overview Primary
Target: N/A · N/A
See overview [1].
14 Deficiency and prevalence
0%
[1]

Risk factors

• Not applicable [1].
15 Frequently asked questions
See overview ▼
Saw palmetto + biotin is a popular hair-loss combination with plausible but unproven synergy. Saw palmetto's 5α-reductase inhibition is proven for BPH, not hair loss (limited hair data). Biotin deficiency causes hair loss but supplementation only helps if deficient (rare in healthy adults). The combination hasn't been studied as a specific pair [1].
16 Regulatory status
United States (FDA): Dietary supplement/food [1].
17 References
[1]See individual ingredient entries for detailed references. REVIEW
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19 Cite this page
Vancouver
Pkhakadze G. Saw Palmetto + Biotin — safety profile [Internet]. Tbilisi: Public Health Institute of Georgia; 2026 [cited 2026 May 30]. Available from: https://supplement.ge/ingredients/saw-palmetto-biotin/
APA 7th
Pkhakadze, G. (2026). Saw Palmetto + Biotin — Safety profile. Public Health Institute of Georgia. https://supplement.ge/ingredients/saw-palmetto-biotin/
CC BY 4.0
🛡 SupplementIndex receives no funding from supplement manufacturers. All content independently authored by PHIG.
GP
Reviewed by Prof. G. Pkhakadze, MD, MPH, PhD
Editor-in-Chief, Georgian Medical Journal · Chair, PHIG
Last reviewed: May 2026 · Next: November 2026
This entry is provided for educational and public health purposes under CC BY 4.0. Consult your healthcare provider before starting any supplement. For corrections: info@accreditation.ge.
Publisher: PHIG · Editor-in-Chief: Prof. Giorgi Pkhakadze, MD, MPH, PhD