Biotin per Hair, Skin & Nails Health

C Evidenze Evidenza limitata da studi di piccole dimensioni, ma esistono alcuni segnali positivi.

Biotin deficiency clearly causes skin and nail problems. However, systematic reviews have found limited evidence that supplementation above adequate intake levels improves outcomes in non-deficient individuals.

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In sintesi

Key Study Findings

review

Nail Supplements: When, How, and Why?

Dose: biotin, collagen peptides, solubilized keratin MSM, choline-stabilized orthosilicic acid vs: Placebo Effetto: None None

Key Statistics

Studi

540

Partecipanti

↑

Positive

Grado

Referenced Papers

Nail Supplements: When, How, and Why? Review

Skin appendage disorders 2025

Cystine-thiamin-containing hair-growth formulation modulates the response to UV radiation in an in vitro model for growth-limiting conditions of human keratinocytes. Other

Journal of photochemistry … 2018 16 citazioni

Dosage & Usage

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

Dosaggi di uso comune

general:: 30 mcg/day (AI)
skinhairnails:: 2,500-5,000 mcg/day

Limite massimo: No established UL (water-soluble); may interfere with lab tests at high doses

Dosaggi studiati nella ricerca

Dosaggio	Durata	Effetto	N
biotin, collagen peptides, solubilized keratin MSM, choline-stabilized orthosilicic acid	--	Positive	--

Momento migliore per l'assunzione: With meals for better absorption

Safety & Side Effects

Effetti collaterali segnalati

⚠ Generally well-tolerated
⚠ May cause acne breakouts at high doses (> 5,000 mcg)
⚠ Interferes with troponin and thyroid laboratory tests

Interazioni note

● Laboratory test interference (troponin, thyroid panels, vitamin D assays)
● Anticonvulsants (carbamazepine, phenytoin may reduce biotin levels)
● Prolonged antibiotic use (may reduce gut biotin synthesis)

Livello di assunzione massimo tollerabile: No established UL (water-soluble); may interfere with lab tests at high doses

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

Frequently Asked Questions

Does Biotin help with Hair, Skin & Nails Health?

Based on 8 studies with 540 participants, there is limited but promising evidence that Biotin may support Hair, Skin & Nails Health management. Our evidence grade is C (Some Evidence).

How much Biotin should I take for Hair, Skin & Nails Health?

Studies have used various dosages. A commonly studied range is 30 mcg/day (AI). Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of Biotin?

Reported side effects may include Generally well-tolerated, May cause acne breakouts at high doses (> 5,000 mcg), Interferes with troponin and thyroid laboratory tests. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for Biotin and Hair, Skin & Nails Health?

We rate the evidence as Grade C (Some Evidence). This rating is based on 8 peer-reviewed studies with 540 total participants. The overall direction of effect is positive.

Altri ingredienti per Hair, Skin & Nails Health

Silicon (Silica) C Keratin D

Biotin per altre condizioni

Dry Skin D

Verdetto rapido

Evidence Strength52%

Moderate confidence

Analisi degli studi

RCT (0)Meta (0)Other (8)

Confronta le alternative

Scoprite come si confrontano altri ingredienti per questa condizione.

Visualizza tutti gli ingredienti per Hair, Skin & Nails Health

Approfondimenti

References

[1] Ines Zaraa et al.. Skin Appendage Disord. 2025. Nail Supplements: When, How, and Why? doi:10.1159/000541048 PubMed
[2] Thomas Hengl et al.. J Photochem Photobiol B. 2018. Cystine-thiamin-containing hair-growth formulation modulates the response to UV radiation in an in vitro model for growth-limiting conditions of human keratinocytes. doi:10.1016/j.jphotobiol.2018.09.005 PubMed

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.