$9.99 $0.33 per serving
Product analysis
Extra Strength Hair Skin & Nails may help brittle nails, though the evidence for biotin is limited.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality51
Biotin and the collagen use favorable identified forms, while several minerals are also clearly specified. Comparative quality remains uncertain for many accompanying nutrients, and the calcium proportions are undisclosed.
Ingredient Transparency73
All declared amounts and most forms are disclosed, making servings easier to compare. Some forms and the proportions of the calcium blend remain unspecified.
Value For Money43
Biotin offers reasonable value, and some minerals compare favorably at the serving price. The collagen amount is very costly, while value for many other components remains uncertain.
Customer Satisfaction89
Customer ratings are generally positive. A large review base gives that feedback broad support.
Product Focus40
Biotin has limited brittle-nail support, while skin and hair benefits are clearest when intake is low. The small collagen serving is not identified as a tested skin preparation, limiting expectations for skin improvement.
- Format
Tablet - Container
- 90 Tablet(s)
- Per serving
- $0.33
- Also available
Hair Skin & Nails$7.49- Customer rating
- 4.6 · 39,016 ratings
Goals
Impact
Moderate effect
Biotin · 5000 mcgVitamin D · 25 mcgZinc · 7.5 mgVitamin C · 60 mgCollagen · 50 mg
Horsetail Not classified
No linked studies yet.
Impact
Moderate effect
Zinc · 7.5 mgVitamin C · 60 mgCollagen · 50 mgVitamin E · 6.75 mg
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin A (Retinyl Palmitate) | 1500 mcg | |
Vitamin C (Ascorbic Acid) | 60 mg | |
Vitamin D3 (Cholecalciferol) | 25 mcg | |
Vitamin E (DL-Alpha-Tocopheryl Acetate) | 6.75 mg | |
Thiamine (Thiamine Hydrochloride) | 5 mg | |
Riboflavin | 2 mg | |
Niacin (Niacinamide) | 25 mg | |
Vitamin B6 (Pyridoxine Hydrochloride) | 5 mg | |
Folate | 334 mcg DFE | |
Vitamin B12 (Cyanocobalamin) | 8 mcg | |
Biotin (D-Biotin) | 5000 mcg | |
Pantothenic Acid (D-Calcium Pantothenate) | 15 mg | |
Choline (Choline Bitartrate) | 10 mg | |
Calcium (Calcium Carbonate, Dicalcium Phosphate) | 372 mg | |
Phosphorus (Dicalcium Phosphate) | 180 mg | |
Magnesium (Magnesium Oxide) | 50 mg | |
Zinc (Zinc Gluconate) | 7.5 mg | |
Manganese (Manganese Gluconate) | 2 mg | |
PABA | 10 mg | |
Inositol | 30 mg | |
Citrus Bioflavonoid / Rutin Complex | 38 mg | |
Horsetail powder | 3 mg | |
Collagen (hydrolyzed Gelatin) | 50 mg |
Phosphorus (Dicalcium Phosphate) · 180 mg OverallScore92
Each serving provides 180 mg of phosphorus at a low cost per serving. The phosphorus comes as Dicalcium Phosphate.
How this ingredient is rated
Active Ingredient Quality & Bioavailability79
The phosphorus comes as Dicalcium Phosphate.
Phosphorus Form Quality
The phosphorus comes as Dicalcium Phosphate.
Form Disclosure Clarity
Dicalcium Phosphate is named in the supplement facts.
Dose, Safety & Label Transparency100
Each serving provides 180 mg of phosphorus. The phosphorus amount is individually listed.
Dose Adequacy and Safety
Each serving provides 180 mg of phosphorus.
Elemental Dose Transparency
The phosphorus amount is individually listed.
Value100
The cost per serving is low.
Price Per Serving Efficiency
The cost per serving is low.
Biotin (D-Biotin) · 5000 mcg OverallScore89
5,000 mcg of biotin per serving is clearly stated; the package cost also covers other vitamins and minerals, so it cannot be attributed to biotin alone. It lists D-biotin, the naturally occurring active form. It contains an artificial color.
How this ingredient is rated
Active Ingredient Quality & Bioavailability92
It lists D-biotin, the naturally occurring active form. It contains an artificial color.
Biologically Active d-Biotin Isomer
It lists D-biotin, the naturally occurring active form.
Excipient Purity
It contains an artificial color.
Dose, Safety & Label Transparency100
The serving provides 5,000 mcg of biotin. The amount is clearly listed.
Biotin Potency for Health Goals
The serving provides 5,000 mcg of biotin.
Label Transparency & Exact Disclosure
The label clearly lists 5,000 mcg of biotin per serving.
Value60
The package cost also covers other vitamins and minerals, so it cannot be attributed to biotin alone.
Price per 5,000 mcg Biotin
The package cost also covers other vitamins and minerals, so it cannot be attributed to biotin alone.
Manganese (Manganese Gluconate) · 2 mg OverallScore82
Each serving provides 2 mg of manganese at a moderate cost per serving. The source is Manganese Gluconate.
How this ingredient is rated
Active Ingredient Quality & Bioavailability80
The manganese comes from Manganese Gluconate.
Manganese Chemical Form
The stated source is Manganese Gluconate.
Dose, Safety & Label Transparency86
The serving provides 2 mg of manganese. Both the amount and source are stated.
Manganese Dosage Efficacy & Safety
A serving contains 2 mg of manganese.
Elemental Weight Disclosure
The label states the manganese amount and source.
Value80
The cost per serving is moderate.
Price per Serving vs. Median
The cost per serving is moderate.
Alternative products
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Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- 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.
- Low serum biotinidase activity in children with valproic acid monotherapy.
- Vitamins A, B, C, and D: A Short Review for the Dermatologist.
- The Infatuation With Biotin Supplementation: Is There Truth Behind Its Rising Popularity? A Comparative Analysis of Clinical Efficacy versus Social Popularity.
- Low-Molecular-Weight Collagen Peptide Supplementation Improves Cellulite Severity, Skin Elasticity, and Hair Shaft Diameter: A Clinical Study with Pharmacokinetic Evaluation.
- Calcium and Vitamin D Supplementation with and Without Collagen on Bone Density and Skin Elasticity in Menopausal Women-A Randomized Controlled Study.
- Dietary Collagen Supplementation as a Strategy for Skin Health: A Narrative Review of Clinical Effects on Skin, Hair, Nails, and Wound Healing.
- Hair Loss After Metabolic and Bariatric Surgery: a Systematic Review and Meta-analysis.
- Quantitative Analysis of Selected Circulating Hematological Biomarkers, Essential Minerals, Vitamins, and Thyroid Hormones in Females Affected by Hair Loss.
- Twelve weeks of protracted venous infusion of fluorouracil (5-FU) is as effective as 6 months of bolus 5-FU and folinic acid as adjuvant treatment in colorectal cancer.
- Role of oxaliplatin combined with 5-fluorouracil and folinic acid in the first- and second-line treatment of advanced colorectal cancer.
- Phase I-II study of vinorelbine in combination with 5-fluorouracil and folinic acid as first-line chemotherapy in metastatic breast cancer: a regimen with a low subjective toxic burden.
- A pilot study evaluating the efficacy of topically applied niacin derivatives for treatment of female pattern alopecia.
- Topical adenosine increases thick hair ratio in Japanese men with androgenetic alopecia.
- Topical tretinoin for hair growth promotion.
- A review of isotretinoin in the treatment of frontal fibrosing alopecia.
- Efficacy of Isotretinoin and Acitretin in Treatment of Frontal Fibrosing Alopecia: Retrospective Analysis of 54 Cases.
- Systemic Treatments for Lichen Planopilaris and Frontal Fibrosing Alopecia: A Retrospective Study of 315 Patients.
- Tretinoin enhances minoxidil response in androgenetic alopecia patients by upregulating follicular sulfotransferase enzymes.
- Factors Associated with Premature Hair Graying in a Young Indian Population.