Biotin for Dry Skin
D Early Research Only preliminary research exists (lab studies, case reports).Biotin supports fatty acid synthesis in the stratum corneum. Deficiency causes dry skin, but evidence for supplementation in non-deficient individuals is limited.
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D
The Bottom Line
Biotin supports fatty acid synthesis in the stratum corneum. Deficiency causes dry skin, but evidence for supplementation in non-deficient individuals is limited.
Key Study Findings
review
Advanced Applications of Vitamin B Complex in Plastic and Cosmetic Surgery: Mechanisms and Therapeutic Benefits.
Dose: Vitamin B complex (various B vitamins including niacinamide/NAD+ precursor)
vs: Placebo
Effect: None
None
laboratory/in vitro
26 weeks
Personalized Compounded Hair Loss Treatments: A Compatibility Assessment of the TrichoConcept™ Vehicle Line.
Dose: F1: biotin 0.5%, caffeine 2.0%, niacinamide 2.0%; F2: finasteride 0.1%, minoxidil 1.0%, tretinoin 0.
vs: Placebo
Effect: F1 and F3 stable for 180 days; F2 stable for 14 days; F4 and F5 stable for 150 days; F6/F7 stable fo
None
case-control study
n=180
A comprehensive investigation of biochemical status in patients with telogen effluvium: Analysis of Hb, ferritin, …
Dose: not applicable
vs: Placebo
Effect: None
None
Review
Nutritional Supplements for Skin Health-A Review of What Should Be Chosen and Why.
Dose: 14 nutritional compounds (vitamins, minerals, etc.)
vs: None
Outcome: Skin health and barrier function
Effect: None
None
Population: General population (skin health review)
Review
Dietary supplements in dermatology: A review of the evidence for zinc, biotin, vitamin D, nicotinamide, …
Dose: None
vs: Placebo
Effect: None
None
cross-sectional survey
n=144
Use of Vitamins and Minerals in the Treatment of Hair Loss: A Cross-Sectional Survey among …
Dose: None
vs: Placebo
Effect: None
None
Key Statistics
2
Studies
100
Participants
↑
Positive
D
Grade
Referenced Papers
International journal of …
2025
International journal for …
2025
Journal of cosmetic …
2024
7 citations
Medicina (Kaunas, Lithuania)
2023
41 citations
Journal of the …
2021
46 citations
Journal of photochemistry …
2018
16 citations
International journal of …
2016
89 citations
Journal of cutaneous …
2014
10 citations
Clinics in dermatology
2010
98 citations
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 30 mcg/day (AI)
- skinhairnails:
- 2,500-5,000 mcg/day
Upper limit: No established UL (water-soluble); may interfere with lab tests at high doses
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| Vitamin B complex (various B vitamins including niacinamide/NAD+ precursor) | -- | Positive | -- |
| F1: biotin 0.5%, caffeine 2.0%, niacinamide 2.0%; F2: finasteride 0.1%, minoxidil 1.0%, tretinoin 0. | 26 weeks | Positive | -- |
| not applicable | -- | Mixed | 180 |
| 14 nutritional compounds (vitamins, minerals, etc.) | -- | Positive | -- |
| None | -- | Mixed | -- |
| None | -- | Neutral | 144 |
Best taken: With meals for better absorption
Safety & Side Effects
Reported Side Effects
- ⚠ Generally well-tolerated
- ⚠ May cause acne breakouts at high doses (> 5,000 mcg)
- ⚠ Interferes with troponin and thyroid laboratory tests
Known Interactions
- ● Laboratory test interference (troponin, thyroid panels, vitamin D assays)
- ● Anticonvulsants (carbamazepine, phenytoin may reduce biotin levels)
- ● Prolonged antibiotic use (may reduce gut biotin synthesis)
Tolerable upper intake: No established UL (water-soluble); may interfere with lab tests at high doses
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Biotin help with Dry Skin?
Based on 2 studies with 100 participants, there is preliminary evidence that needs more research that Biotin may support Dry Skin management. Our evidence grade is D (Very Early Research).
How much Biotin should I take for Dry Skin?
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 Dry Skin?
We rate the evidence as Grade D (Very Early Research). This rating is based on 2 peer-reviewed studies with 100 total participants. The overall direction of effect is positive.
Related Evidence
Other ingredients for Dry Skin
Biotin for other conditions
References
- [1] Carolina Schettino Kegele et al.. Int J Pharm Compd. 2025. Personalized Compounded Hair Loss Treatments: A Compatibility Assessment of the TrichoConcept™ Vehicle Line. PubMed
- [2] Feiya Du et al.. Int J Vitam Nutr Res. 2025. Advanced Applications of Vitamin B Complex in Plastic and Cosmetic Surgery: Mechanisms and Therapeutic Benefits. doi:10.31083/IJVNR39087 PubMed
- [3] Irem Nur Durusu Turkoglu et al.. J Cosmet Dermatol. 2024. A comprehensive investigation of biochemical status in patients with telogen effluvium: Analysis of Hb, ferritin, vitamin B12, vitamin D, thyroid … doi:10.1111/jocd.16512 PubMed
- [4] Jacek Januszewski et al.. Medicina (Kaunas). 2023. Nutritional Supplements for Skin Health-A Review of What Should Be Chosen and Why. doi:10.3390/medicina60010068 PubMed
- [5] Katherine G Thompson et al.. J Am Acad Dermatol. 2021. Dietary supplements in dermatology: A review of the evidence for zinc, biotin, vitamin D, nicotinamide, and Polypodium. doi:10.1016/j.jaad.2020.04.123 PubMed
- [6] 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
- [7] Ralph M Trüeb. Int J Trichology. 2016. Serum Biotin Levels in Women Complaining of Hair Loss. doi:10.4103/0974-7753.188040 PubMed
- [8] Thamer Mubki. J Cutan Med Surg. 2014. Use of Vitamins and Minerals in the Treatment of Hair Loss: A Cross-Sectional Survey among Dermatologists in Saudi Arabia. doi:10.2310/7750.2014.14008 PubMed
- [9] Michael W Cashman et al.. Clin Dermatol. 2010. Nutrition and nail disease. doi:10.1016/j.clindermatol.2010.03.037 PubMed
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.