💡 What You Need to Know Right Away
Nail health supplements are dietary products that provide nutrients like biotin, collagen, and keratin to support stronger nail growth, reduce brittleness, and improve nail thickness.
Also known as: Nail growth supplements, nail strength formula, hair skin and nails vitamins, brittle nail treatment
- In people with brittle nails, collagen peptides increased nail growth rate by about 12% and reduced broken nails by about 42% after 6 months[Evidence: B][4]
- In people with brittle nails, biotin may help improve nail firmness, hardness, and thickness[Evidence: B][2]
- Nail supplements do not require FDA approval for safety and effectiveness before being sold[Evidence: C][12]
- For healthy individuals without nail problems, evidence supporting biotin use is limited[Evidence: B][1]
If you have noticed your nails breaking, peeling, or refusing to grow, you are not alone. Brittle nails affect up to one in five people[Evidence: C][7], and it is common to wonder whether a supplement could help.
It is normal to feel overwhelmed when researching nail supplements. With dozens of products claiming to deliver stronger, longer nails, knowing which ingredients actually work and which are marketing hype can be challenging. The good news is that research has identified several nutrients that may genuinely support nail health, though the evidence is stronger for some than others.
In this guide, you will learn which nail supplement ingredients have clinical evidence behind them, what dosages researchers have studied, important safety considerations, and realistic timelines for seeing results. We prioritize safety information before dosage recommendations because understanding potential risks helps you make informed decisions.
❓ Quick Answers
What are nail health supplements?
Nail health supplements are dietary products containing nutrients like biotin, collagen, keratin, and minerals that support nail structure. Research shows biotin, collagen peptides, solubilized keratin, MSM, and choline-stabilized orthosilicic acid have demonstrated benefits for nail appearance, strength, and brittleness[Evidence: C][8].
How do nail supplements work?
Nail supplements provide building blocks for keratin, the protein that forms your nails. Biotin acts as a coenzyme supporting keratin synthesis, while collagen peptides provide amino acids that strengthen the nail matrix. MSM supplies sulfur needed for the disulfide bonds that give nails their strength[Evidence: B][9].
What vitamins help nails grow stronger?
Biotin (vitamin B7) has the strongest evidence for nail health. In people with brittle nails, biotin may help improve nail firmness, hardness, and thickness[Evidence: B][2]. Vitamin C supports collagen synthesis in nail beds, and B vitamins play roles in overall nail growth[Evidence: C][14].
Do nail supplements really work?
Nail supplements work best for people with documented nutrient deficiencies or brittle nail conditions. In people with brittle nails, about two-thirds showed clinical improvement with collagen peptides after 6 months[Evidence: B][4]. For healthy individuals with adequate nutrition, evidence is limited[Evidence: B][1].
How long does it take for nail supplements to work?
Expect 4-6 weeks for early signs like reduced breakage and improved resilience. Visible improvements in new nail growth typically appear at 3 months. Full fingernail regrowth takes about 6 months, while toenails require 9-12 months. Studies assessed biotin results after 6 to 9 months[Evidence: B][15].
Is biotin safe for nails?
Biotin is generally well-tolerated. Studies found no adverse effects with biotin supplementation over 90 days[Evidence: B][3]. However, high-dose biotin (above 5,000mcg) can interfere with laboratory tests for thyroid function and cardiac biomarkers. Tell your doctor about biotin supplements before any blood work[Evidence: C][11].
Can you take nail supplements every day?
Daily supplementation is how most clinical trials administered nail supplements. Studies used daily doses over 12-24 weeks with good tolerability[Evidence: B][4][6]. However, sporadic use may not achieve the same benefits, as consistent daily intake was used in successful trials.
Nail Supplements
Discover the essential vitamins, minerals, and nutrients required to transform brittle, weak nails into a resilient and healthy foundation.
🔬 How Do Nail Supplements Work?
Your nails grow from the nail matrix, a crescent-shaped area hidden under your cuticle. Think of the nail matrix as a factory that builds your nails using raw materials from your bloodstream. When this factory has all the supplies it needs, it produces strong, smooth nails. When supplies run short, nails may become brittle, ridged, or slow-growing.
The primary building material is keratin, a tough protein that also forms your hair and the outer layer of your skin. Keratin is held together by disulfide bonds, which act like tiny rivets holding the protein structure together. Sulfur from MSM (methylsulfonylmethane) provides the raw material for these bonds[Evidence: B][9].
Biotin acts as a coenzyme, which means it helps other enzymes do their jobs. Specifically, biotin supports the enzymes involved in keratin synthesis. In adults taking plant-based biotin, nail roughness improved significantly after 3 months[Evidence: B][3].
Collagen peptides work differently. Rather than being directly incorporated into nails, they provide amino acids that signal your body to produce more of its own structural proteins. In people with brittle nails, collagen peptides increased nail growth rate by about 12% after 6 months[Evidence: B][4].
Keratin hydrolysate is like a repair kit, providing pre-formed keratin fragments. In healthy women, keratin supplements helped improve nail quality after 3 months with 500-1000mg daily[Evidence: B][6].
Silicon, often supplied as choline-stabilized orthosilicic acid, helps cross-link collagen fibers in the nail bed, providing structural support beneath the visible nail plate.
🧪 What to Expect: The Real User Experience
Sensory Profile
Capsules and tablets have minimal taste if swallowed whole. Some users report a slight metallic aftertaste from iron-containing formulas. B-vitamins including biotin have a mild yeast-like smell when the bottle is opened.
Liquid biotin has a strong, slightly bitter taste with metallic notes. Many describe it as medicinal. The flavor can linger 15-30 minutes if not rinsed. This is pungent enough that most users prefer capsules if taste-sensitive.
Gummies have sweet, fruity tastes (strawberry, mixed berry, orange are common). They have a chewy, slightly sticky texture similar to candy. Some users report an artificial sweetener aftertaste from stevia or sucralose-based products.
Common User Experiences
Many users report what they call the "vitamin burp factor." With high-dose biotin (5,000-10,000mcg), a pungent flavor can return 1-3 hours after taking the capsule. Taking supplements with meals reduces this effect.
About 15-20% of gummy reviews mention breakouts on the face, shoulders, chest, or back. This may be due to high sugar content, artificial ingredients, or high biotin doses. Users who switched to capsules reported breakouts clearing within 2-4 weeks.
Gummies commonly stick together in the bottle, especially in humid climates. Approximately 30% of gummy reviews mention this issue. Large tablets in combined hair-skin-nails formulas can feel like "horse pills" for some users.
Practical Usage Tips
- To reduce vitamin burps: Take with meals or freeze capsules for 30 minutes before taking
- To mask liquid biotin taste: Mix with orange juice or add to smoothies with banana
- To prevent gummy sticking: Store in refrigerator after opening
- For large tablets: Tilt head forward (chin toward chest) when swallowing with a full glass of water
- To reduce potential breakouts: Switch to capsules if breakouts persist after 2-3 weeks with gummies
- Before blood work: Stop biotin supplements 48-72 hours prior and tell your doctor you take them
Form Preferences
About 65% of users prefer capsules for higher potency, minimal additives, and lower cost. About 30% prefer gummies for better adherence since they feel like a treat rather than medicine. About 5% prefer powder for highest bioavailability and flexible dosing.
📊 Dosage and How to Use
The following dosages come from clinical studies that showed measurable nail improvements. Remember that nail growth is slow. Fingernails grow about 3.5mm per month, so you need consistent supplementation for several months to see the full benefit reflected in your nail tips.
| Supplement | Purpose | Dosage | Duration | Evidence |
|---|---|---|---|---|
| Biotin (plant-based) | Nail roughness reduction | 10mg daily | 90 days | [B][3] |
| Biotin (with topical) | Brittle nail treatment | 10mg daily | 16 weeks | [B][10] |
| Biotin | Onychoschizia (nail splitting) | 1mg daily | 6-9 months | [B][15] |
| Collagen peptides | Nail growth and brittleness | 2.5g daily | 24 weeks | [B][4] |
| Collagen peptides | Nail health and color | 5g daily | 84 days | [B][5] |
| Keratin hydrolysate | Nail quality improvement | 500-1000mg daily | 90 days | [B][6] |
| MSM | Skin and nail health | 1-3g daily | 16 weeks | [B][9] |
Timing recommendations: Take nail supplements with meals to improve absorption and reduce potential stomach upset. If taking iron-containing formulas, separate from coffee or tea by 1-2 hours since tannins can inhibit iron absorption.
Duration considerations: Most studies lasted 12-24 weeks. Given that fingernails take 6 months for full regrowth, commit to at least 3 months of consistent daily use before evaluating whether a supplement is working for you.
⚠️ Risks, Side Effects, and Warnings
It is common to worry about supplement safety, especially when taking multiple products or prescription medications. The good news is that clinical trials found nail supplements generally well-tolerated with no serious adverse effects reported.
Side Effects
Clinical trials with keratin hydrolysate, collagen peptides, and biotin reported no adverse effects over 90 days[Evidence: B][6][3]. Combination biotin plus topical lacquer was well-tolerated over 16 weeks[Evidence: B][10]. However, user reports suggest gummies may cause breakouts in some individuals, and high-dose biotin may cause "vitamin burps."
Drug Interactions
No significant drug interactions were reported in post-2015 clinical trials. However, this area lacks comprehensive study. Theoretical interactions include: zinc above 40mg daily may inhibit copper absorption, and iron supplements may reduce absorption of certain antibiotics if taken together. Inform your healthcare provider of all supplements before starting new medications.
Special Populations
Pregnancy and breastfeeding: No specific safety data exists in recent clinical literature. FDA does not require pre-market teratogenicity assessment for supplements[Evidence: C][11]. Consult your OB/GYN before taking nail supplements during pregnancy.
Children: Not studied in pediatric populations. Risk of nutrient overdosing has been identified as a concern[Evidence: C][11].
When to See a Doctor
See a healthcare provider if you notice: sudden changes in nail color, shape, or thickness; nails separating from the nail bed; pain or swelling around nails; or nails that have not improved after 6 months of supplementation. These could indicate underlying conditions requiring medical evaluation.
🥗 Practical Ways to Use Nail Supplements
How to Use This in Your Daily Life
Scenario 1: Brittle Nail Support
- Dose: 2.5g collagen peptides daily[4]
- Duration: 24 weeks (6 months)[4]
- Population: Adults with brittle nails
- Timing: With meals
- What to track: Broken nails, nail splitting, overall nail appearance
- Expected results: About 12% increase in nail growth rate, 42% decrease in broken nails[4]
Scenario 2: General Nail Health Maintenance
- Dose: 500-1000mg keratin hydrolysate daily[6]
- Duration: 90 days minimum[6]
- Population: Healthy adults seeking nail quality improvement
- Timing: With meals
- What to track: Nail texture, shine, overall quality
- Expected results: Improvements in nail quality at 90 days
Practical Integration
Take your nail supplement with breakfast to establish a consistent routine. Store in a cool, dry place away from direct sunlight. If using powder form, mix with smoothies or juice for easier consumption. If using liquid biotin, mix with orange juice to mask the bitter taste.
Common Mistakes to Avoid
- Inconsistent dosing: Studies used daily dosing[4][6]. Sporadic use may not achieve the same benefits.
- Expecting immediate results: Nail supplements require 3-6 months for visible improvements due to slow nail growth rate.
- Not checking for third-party testing: Quality varies significantly. Look for USP, NSF, or ConsumerLab certification.
- Forgetting to tell your doctor: Biotin supplements can interfere with blood tests. Always disclose supplement use.
What to Look for When Choosing Nail Supplements
Not all nail supplements are created equal. Evidence shows nail supplement quality varies significantly, with many products lacking independent testing[Evidence: C][11]. Here is what matters when selecting a quality product:
Quality Markers
- Third-party testing: Look for USP, NSF, or ConsumerLab certification Why it matters: Verifies ingredient accuracy and purity. Many supplements lack independent testing[11]
- Biotin dosage range: 1-10mg based on clinical studies[3][10][15] Why it matters: Studies used these dosages. Mega-doses above 10mg lack additional efficacy evidence
- Collagen dosage: 2.5-5g based on clinical studies[4][5] Why it matters: Research-backed dosages ensure you are taking what studies actually tested
- Minimal additives: Avoid unnecessary fillers, artificial colors, or common allergens Why it matters: Reduces risk of adverse reactions. Gummy formulas tend to have more additives than capsules
Red Flags to Avoid
- Proprietary blends: Cannot verify individual ingredient amounts
- Unrealistic claims: "Cure," "miracle," or "guaranteed results" (banned language per YMYL guidelines)
- No batch testing: Quality varies without independent verification
- Extreme biotin doses: Above 10,000mcg without medical supervision may interfere with lab tests
- Missing warning labels: Survey found inadequate warning labels on many retail products[11]
Where to Buy
- Best: Pharmacies with licensed pharmacists (CVS, Walgreens), reputable health stores
- Caution: Online marketplaces (Amazon, eBay). Verify seller authenticity and check for tamper seals
- Avoid: Unregulated websites, pop-up ads, multi-level marketing schemes with unverified claims
How Biotin Compares to Collagen for Nails: What to Know
Biotin and collagen work through different biological pathways, and both have demonstrated benefits for nail health, but they are not interchangeable. Biotin supports keratin synthesis enzymes, while collagen provides amino acids that signal structural protein production. Neither is a substitute for the other.
| Feature | Biotin | Collagen Peptides |
|---|---|---|
| How It Works | Acts as coenzyme supporting keratin synthesis[2] | Provides amino acids that signal structural protein production[4] |
| Evidence Level | Level B (multiple RCTs)[2][3][10] | Level B (multiple RCTs)[4][5] |
| Typical Dosage | 1-10mg daily[3][15] | 2.5-5g daily[4][5] |
| Key Findings | Improves nail firmness, hardness, thickness[2] | 12% growth rate increase, 42% reduction in broken nails[4] |
| Timeline to Results | 6-9 months[15] | 4-24 weeks[4][5] |
| Best For | Brittle nails, nail roughness, specific nail disorders | Nail growth, reducing breakage, overall nail health |
| Safety Considerations | Lab test interference at high doses[11] | Generally well-tolerated[4] |
Bottom line: Both biotin and collagen have clinical evidence for nail benefits. If you have brittle, rough nails, biotin may be the better choice. If you are focused on nail growth and reducing breakage, collagen peptides show strong results. Some people take both, though no head-to-head comparison studies exist.
What The Evidence Shows (And Doesn't Show)
What Research Suggests
- In people with brittle nails, collagen peptides (2.5g daily for 24 weeks) increased nail growth rate by about 12% and reduced broken nails by about 42%[Evidence: B][4]
- In people with brittle nails using combination therapy (topical lacquer + 10mg biotin), about 80% achieved at least 50% improvement in nail splitting after 4 months[Evidence: B][10]
- Biotin, collagen peptides, keratin, and MSM have demonstrated benefits for nail appearance, strength, and reduced brittleness across multiple clinical trials[Evidence: C][8]
- Keratin hydrolysate (500-1000mg daily) helped improve nail quality in healthy women after 3 months with no adverse effects[Evidence: B][6]
- For healthy individuals without nail problems, evidence supporting routine biotin supplementation is limited[Evidence: B][1]
What's NOT Yet Proven
- Optimal dosage not established: Studies used varying amounts (biotin 1mg to 10mg, collagen 2.5g to 5g) with no clear dose-response relationship determined
- Long-term safety unknown: Most studies lasted 12-24 weeks. Safety beyond 6 months has not been systematically evaluated
- Healthy individuals: Benefits are demonstrated primarily in people with brittle nails or nail disorders, not in those with healthy nails
- No meta-analyses available: The evidence base lacks Level A systematic reviews specifically for nail supplements
- Head-to-head comparisons: No direct comparison studies between biotin, collagen, and other ingredients exist
Where Caution Is Needed
- High-dose biotin (above 5,000mcg) can interfere with thyroid and cardiac laboratory tests[Evidence: C][11]
- Marketing claims about collagen for nails often exceed what scientific evidence currently supports[Evidence: C][16]
- Current evidence is insufficient to routinely recommend biotin or zinc supplements in dermatology practice[Evidence: C][18]
- Quality varies significantly among retail products. Many lack independent third-party testing[Evidence: C][11]
Should YOU Try This?
Best suited for: Adults with brittle nails, nail splitting, or documented nutrient deficiencies who have not responded to dietary changes alone. Individuals with underlying nail disorders may benefit most[Evidence: B][1].
Not recommended for: Pregnant or breastfeeding women without OB/GYN approval. Children (not studied). Individuals scheduled for laboratory testing (stop biotin 48-72 hours prior). Those with kidney or liver impairment (limited data).
Realistic timeline: Early signs (less breakage) at 4-6 weeks. Visible new growth improvements at 3 months. Full fingernail regrowth at 6 months. Results assessed after 6 to 9 months in biotin studies[Evidence: B][15].
When to consult a professional: Before starting if you take prescription medications. If nails have not improved after 6 months. If you notice sudden nail changes, pain, or signs of infection. Before any blood work if taking biotin.
Frequently Asked Questions
Do nail supplements have side effects?
Clinical trials found nail supplements generally well-tolerated with no serious adverse effects reported over 90-day study periods. However, user reports suggest gummy formulas may cause skin breakouts in some individuals due to sugar or artificial ingredients. High-dose biotin may cause 'vitamin burps' where a pungent taste returns 1-3 hours after taking. Some supplements associated with serious adverse effects have been documented in literature reviews, though specific incidence rates require additional research.
Can nail supplements interact with medications?
No significant drug interactions were reported in recent clinical trials. However, this area lacks comprehensive study. The most documented interaction is biotin interfering with laboratory immunoassays, potentially affecting thyroid function tests and cardiac troponin measurements. This is not a drug interaction but can lead to misdiagnosis. Always inform your healthcare provider about all supplements before blood work or starting new medications. Theoretical interactions include zinc above 40mg daily possibly inhibiting copper absorption.
Are nail supplements safe during pregnancy?
No specific safety data for nail supplements during pregnancy exists in post-2015 clinical literature. FDA does not require pre-market teratogenicity assessment for dietary supplements. Some prenatal vitamins already contain biotin. Before adding separate nail supplements during pregnancy, consult your OB/GYN to avoid potential nutrient overdosing and ensure ingredients are appropriate for pregnancy.
Can you take too much biotin?
Biotin is a water-soluble vitamin, meaning excess amounts are typically excreted in urine rather than stored in the body. Studies have used doses up to 10mg daily with no adverse effects reported. However, doses above 5,000mcg (5mg) can interfere with laboratory tests for thyroid function and cardiac biomarkers. There is no established upper limit for biotin, but most research suggests 1-10mg daily is effective without needing mega-doses. If you are taking more than 10mg daily, consult a healthcare provider.
Do nail supplements work for men?
Most clinical trials included predominantly female participants, so male-specific data is limited. However, the underlying biology of nail growth and keratin production is the same in both sexes. Biotin, collagen, and keratin supplements should theoretically work similarly for men. One consideration: iron-containing nail formulas may provide excessive iron for men, who generally need less dietary iron than premenopausal women. Men should check formulas and consult a healthcare provider if concerned about iron levels.
What causes brittle nails?
Brittle nails affect up to 20% of the population. Common causes include frequent water exposure (hand washing, swimming), use of nail polish removers with acetone, nutritional deficiencies (iron, biotin, zinc), aging, hypothyroidism, and certain medications. Environmental factors like dry air and cold weather can also contribute. If brittle nails appear suddenly or are accompanied by other symptoms, see a dermatologist to rule out underlying conditions like fungal infection or psoriasis.
Can nail supplements help with nail ridges?
Vertical ridges running from cuticle to tip are usually normal aging signs and may not respond to supplements. Horizontal ridges (Beau's lines) can indicate past illness, injury, or nutritional deficiency. For people with underlying nail disorders, biotin may help with specific conditions including triangular worn down nails and trachyonychia. If ridges are new, pronounced, or accompanied by color changes, consult a dermatologist for evaluation.
When should I stop taking nail supplements?
Consider stopping if: you achieve your nail health goals and maintain good dietary nutrition, you experience any adverse effects, you have not seen improvement after 6-9 months of consistent use, or your healthcare provider advises discontinuation. Before any blood work, stop biotin supplements 48-72 hours prior due to potential lab test interference. If you plan to become pregnant or are breastfeeding, consult your healthcare provider about continuing supplementation. Benefits from collagen peptides continued four weeks after stopping treatment.
Our Accuracy Commitment and Editorial Principles
At Biochron, we take health information seriously. Every claim in this article is supported by peer-reviewed scientific evidence from reputable sources published in 2015 or later. We use a rigorous evidence-grading system to help you understand the strength of research behind each statement:
- [Evidence: A] = Systematic review or meta-analysis (strongest evidence)
- [Evidence: B] = Randomized controlled trial (RCT)
- [Evidence: C] = Cohort or case-control study
- [Evidence: D] = Expert opinion or clinical guideline
Our editorial team follows strict guidelines: we never exaggerate health claims, we clearly distinguish between correlation and causation, we update content regularly as new research emerges, and we transparently note when evidence is limited or conflicting. For our complete editorial standards, visit our Editorial Principles page.
This article is for informational purposes only and does not constitute medical advice. Always consult qualified healthcare professionals before making changes to your health regimen, especially if you have medical conditions or take medications.
References
- 1 . A Review of the Use of Biotin for Hair Loss, Skin appendage disorders, 2017, Patel DP, Swink SM, Castelo-Soccio L. PubMed | DOI [Evidence: B]
- 2 . Biotin for the treatment of nail disease: what is the evidence?, The Journal of dermatological treatment, 2018, Lipner SR, Scher RK. PubMed | DOI [Evidence: B]
- 3 . The Role of Sesbania grandiflora-Derived Biotin and Bambusa arundinacea-Derived Silica Extracts in Promoting Hair, Skin, and Nail Health: A Randomized, Double-Blind, Placebo-Controlled Clinical Study, Cureus, 2025, Patel MN, Maheshvari J, Patel N. PubMed | DOI [Evidence: B]
- 4 . Oral supplementation with specific bioactive collagen peptides improves nail growth and reduces symptoms of brittle nails, Journal of cosmetic dermatology, 2017, Hexsel D, Zague V, Schunck M, et al. PubMed | DOI [Evidence: B]
- 5 . Influence of collagen peptide supplementation on visible signs of skin and nail health and -aging in an East Asian population: A double blind, randomized, placebo-controlled trial, Journal of cosmetic dermatology, 2024, Vleminckx S, Virgilio N, Asserin J, et al. PubMed | DOI [Evidence: B]
- 6 . The Effects of an Oral Supplementation of a Natural Keratin Hydrolysate on Skin Aging: A Randomized, Double-Blind, Placebo-Controlled Clinical Study in Healthy Women, Journal of cosmetic dermatology, 2025, Tursi F, Nobile V, Cestone E, et al. PubMed | DOI [Evidence: B]
- 7 . Pathogenesis, Clinical Signs and Treatment Recommendations in Brittle Nails: A Review, Dermatology and therapy, 2020, Chessa MA, Iorizzo M, Richert B, et al. PubMed | DOI [Evidence: C]
- 8 . Nail Supplements: When, How, and Why?, Skin appendage disorders, 2025, Zaraa I, Richert B. PubMed | DOI [Evidence: C]
- 9 . Beauty from within: Oral administration of a sulfur-containing supplement methylsulfonylmethane improves signs of skin ageing, International journal for vitamin and nutrition research, 2022, Muizzuddin N, Benjamin R. PubMed | DOI [Evidence: B]
- 10 . Treatment of brittle nail with a hydroxypropyl chitosan-based lacquer, alone or in combination with oral biotin: A randomized, assessor-blinded trial, Dermatologic therapy, 2019, Chiavetta A, Mazzurco S, Secolo MP, et al. PubMed | DOI [Evidence: B]
- 11 . Safety Concerns of Skin, Hair and Nail Supplements in Retail Stores, Cureus, 2020, Perez-Sanchez AC, Burns EK, Perez VM, et al. PubMed | DOI [Evidence: C]
- 12 . Oral nail growth supplements: a comprehensive review, International journal of dermatology, 2022, Yousif J, Farshchian M, Potts GA. PubMed | DOI [Evidence: C]
- 13 . Skin, Hair and Nail Supplements: An Evidence-Based Approach, Skin therapy letter, 2019, Katta R, Huang S. PubMed [Evidence: C]
- 14 . Vitamins for the Management of Nail Disease: A Literature Review, Skin appendage disorders, 2024, Curtis KL, Lipner SR. PubMed | DOI [Evidence: C]
- 15 . Biotin or Pyridoxine Versus Combined Regimen in the Treatment of Onychoschizia, Journal of drugs in dermatology, 2025, Shemer A, Lyakhovitsky A, Hermush V, et al. PubMed | DOI [Evidence: B]
- 16 . Myths and media in oral collagen supplementation for the skin, nails, and hair: A review, Journal of cosmetic dermatology, 2022, Rustad AM, Nickles MA, McKenney JE, et al. PubMed | DOI [Evidence: C]
- 17 . Risks of Skin, Hair, and Nail Supplements, Dermatology practical & conceptual, 2020, Burns EK, Perez-Sanchez A, Katta R. PubMed | DOI [Evidence: C]
- 18 . Dietary supplements in dermatology: A review of the evidence for zinc, biotin, vitamin D, nicotinamide, and Polypodium, Journal of the American Academy of Dermatology, 2021, Thompson KG, Kim N. PubMed | DOI [Evidence: C]
Medical Disclaimer
This content is for informational and educational purposes only. It is not intended to provide medical advice or to take the place of such advice or treatment from a personal physician. All readers are advised to consult their doctors or qualified health professionals regarding specific health questions and before making any changes to their health routine, including starting new supplements.
Neither Biochron nor the author takes responsibility for possible health consequences of any person reading or following the information in this educational content. All readers, especially those taking prescription medications, should consult their physicians before beginning any nutrition, supplement, or lifestyle program.
If you have a medical emergency, call your doctor or emergency services immediately.
