Longer, Stronger Hair and Nails

product on market Softgel Capsule Irwin Naturals 🟢 Safety: 100/100
Brand: Irwin Naturals
🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 31% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

2 Liquid Softgel(s) Serving Size
30 Servings
Other Combinations Product Type
31% Evidence Coverage

Supplement Facts — Evidence Check

Calories
20 Calorie(s)
Total Fat
1 Gram(s) (1% DV)
Protein
1 Gram(s)
Vitamin C
200 mg (222% DV)
2600 mcg (8667% DV)
📊 86.7× RDA — above typical dose 📚 26 studies (Tier A: 0, B: 11)
RDA 0.03mg This product: 2.6mg
Calcium
30 mg (2% DV)
10 mg (91% DV)
✅ Within RDA (0.9× RDA of 11 mg) 📚 258 studies (Tier A: 6, B: 134)
RDA 11mg This product: 10mg UL 40mg
1 mg (111% DV)
✅ 1.1× RDA — within safe limits 📚 36 studies (Tier A: 0, B: 11)
RDA 0.9mg This product: 1mg UL 10mg
5 mg (217% DV)
✅ 2.2× RDA — within safe limits 📚 8 studies — no high-quality reviews
RDA 2.3mg This product: 5mg UL 11mg
1058 mg
📊 Market median: 1000.0mg (212 products) 📚 12 studies (Tier A: 0, B: 3)
This product: 1058mg
Gotu Kola extract
180 mg
160 mg
📊 Market median: 108.0mg (8 products) 📚 9 studies (Tier A: 0, B: 4)
This product: 160mg
Citrus extract
100 mg
80 mg
📊 Market median: 500.0mg (159 products)
Median 500.0mg This product: 80mg
Proline
80 mg
BioPerine Complex
12 mg

Other Ingredients

Gelatin purified Water Glycerin Beeswax Soy Lecithin Titanium Dioxide Dextrin Caramel Red Cabbage extract Maltodextrin

Label Claims — Verification

❓ Nutrient
❓ All Other
❓ Structure/Function
All Other (99% of products) Structure/Function (83% of products) Nutrient (54% of products)

Target Groups

Adult (18 - 50 Years)

Product Information

📋 Directions for Use

Directions: (Adult) Take two (2) Liquid Soft-Gel daily with meals and a full glass (8 oz) of water.

⚠️ Warnings & Precautions

Usage Warnings: Do not use if safety seal is broken.

Check with your doctor before using this product if you are using medication or have any medical conditions. Do not use if you may become pregnant, are pregnant or nursing.

Do not exceed recommended daily intake.

Not intended for use by persons under 18. Keep out of reach of children.

Contains: Soy

🧪 Formulation Notes

Nutrients to Strengthen: Horsetail is a nutritive plant full of important minerals, and is standardized to supply 11.2 mg silica per dose. Biotin is an essential vitamin that improves the strength and luster of brittle nails. Connective Tissue Support: A special blend of vitamins and minerals provide the ingredients necessary to build and protect connective tissue. Proline and Lysine are two key elements of collagen structure. Free Radical Protection: The best way to maintain healthy skin, hair and nails is to protect them from damage. Bioflavonoids possess antioxidant qualities to protect the cells from free radicals that are created by the sun and environmental pollution. What makes us different: Liquid Soft-Gels - The nutrients in these easy-to-swallow Liquid Soft-Gels are released fast.

Patented BioPerine - Our special BioPerine Complex enhances the bioavailability, absorption and potency of many nutrients.

Biotin Silica Vitamin C Proline Zinc Copper Flaxseed Oil Gotu Kola

No preservatives added.

Pass Quality Tested Guaranteed Quality Assurance - Irwin Naturals is committed to providing the highest quality products for your health. We employ compliance testing to ensure purity and potency.

Additional Information

Longer, Stronger Hair and Nails Healthy skin, hair and nails are important not only to appearance but as an indication of internal health as well. Taking steps to improve skin, hair and nail health can not only improve the way you look but enhance the way you feel.

Other forms of delivery can contain binders and fillers that may cause stomach upset and offer no nutritional value. Advanced Liquid Soft- Gels provide an optimum delivery system.

Global Responsibility - Over the years we have donated to organizations that support the environment and the health of our children.

Store in a cool, dry place.

Questions: Contact Consumer Affairs 1-800-297-3273 Weekdays 8:00 AM to 5:00 PM (PST) 100+ Highly Specialized Products: www.IrwinNaturals.com Promote radiant skin

Full Disclosure Ingredient Panel

Product Details

UPC / SKU 7 10363 56939 6
DSLD Entry Date 2021-10-22
Product Type Other Combinations
Form Softgel Capsule
Brand Irwin Naturals
DSLD ID 256342
Data Updated 2026-04-11

Research Evidence

371 Research Sources
54 Avg Quality Score
148 Meta Analysis
82 Systematic Review
71 Rct
62 Clinical Trial
2 Regulatory Source
1 Cochrane Review
1 Narrative Review
1 Other
1 Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
PubMed DOI Cochrane
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
PubMed DOI Cochrane
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
PubMed DOI Cochrane
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
PubMed DOI Cochrane
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
PubMed DOI Cochrane
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
PubMed DOI Cochrane
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
PubMed DOI
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024
PubMed DOI
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
PubMed DOI
View all evidence for Vitamin C →

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