Longer Stronger Hair & Nails
Goals
$15.99 $0.53 per serving
Product analysis
Longer Stronger Hair & Nails may help brittle nails through biotin and support hair or skin when low nutrient intake is a factor. The small collagen amount and uncertain botanical preparations offer less reason to expect added cosmetic benefits.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality46
Zinc citrate and the identified horsetail source are clearer parts of the formula. Several forms remain unspecified, and a well-described source alone does not establish stronger hair or nails.
Ingredient Transparency69
Amounts and most forms are stated, but several forms and the blend composition are missing. Those gaps make the full combination harder to compare.
Value For Money41
Vitamin A and biotin contribute some value, while the small collagen content is costly for the amount supplied. Several other comparisons remain uncertain, leaving the complete formula with mixed value.
Customer Satisfaction87
Customers report very positive satisfaction across a large review pool. Those experiences do not establish that the supplement causes hair or nail growth.
Product Focus35
Biotin has limited support for brittle nails, while zinc and biotin are more relevant to hair when intake is low. The many additions and unidentified blend make the formula less focused than its name suggests.
- Format
Softgel - Container
- 60 Liquid(s)
- Per serving
- $0.53
- Customer rating
- 4.8 · 2,048 ratings
Goals
Impact
High effect
Collagen · 60 mgBiotin · 2500 mcgHorsetail · 200 mg
Horsetail Not classified
No linked studies yet.
Impact
High effect
Biotin · 2500 mcgZinc · 15 mgVitamin C · 100 mgCollagen · 60 mg
Horsetail Not classified
No linked studies yet.
Impact
High effect
Zinc · 15 mgVitamin C · 100 mgCollagen · 60 mgCopper · 2 mg
Impact
Moderate effect
Zinc · 15 mgVitamin C · 100 mgCopper · 2 mgVitamin A · 7500 IU
Impact
Moderate effect
Collagen · 60 mgZinc · 15 mgVitamin C · 100 mg
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin A (Vitamin A Palmitate) | 7500 IU | |
Vitamin C (Ascorbic Acid) | 100 mg | |
Biotin | 2500 mcg | |
Calcium (Calcium Carbonate) | 20 mg | |
Zinc (Zinc Citrate) | 15 mg | |
Copper (Copper Amino Acid Chelate) | 2 mg | |
Horsetail (Equisetum arvense) extract (Silica) | 200 mg | |
Gotu Kola extract (Triterpenes) | 120 mg | |
hydrolyzed Collagen | 60 mg | |
PABA | 30 mg | |
Antioxidant Bioflavonoid Complex | 80 mg |
Copper (Copper Amino Acid Chelate) · 2 mg OverallScore67
A serving provides 2 mg of copper at a moderately high cost. The amount is clearly stated for the selected serving. The copper is an amino acid chelate, but the specific amino acid is not named. The serving also contains 15 mg of zinc, a zinc-to-copper ratio of 7.50:1.
How this ingredient is rated
Active Ingredient Quality & Bioavailability58
The copper is an amino acid chelate, but the specific amino acid is not named. The elemental copper amount and source are stated.
Copper Form Bioavailability
The copper is an amino acid chelate, but the specific amino acid is not named.
Elemental Copper Labeling Clarity
The elemental copper amount and source are stated.
Dose, Safety & Label Transparency85
The serving contains 2 mg of copper. The serving also contains 15 mg of zinc, a zinc-to-copper ratio of 7.50:1.
Copper Dosage Safety & Efficacy
The selected serving provides 2 mg of copper.
Zinc-to-Copper Balance
The serving also contains 15 mg of zinc, a zinc-to-copper ratio of 7.50:1.
Value50
The cost per serving is moderately high.
Price Per Serving Efficiency
The cost per serving is moderately high.
PABA · 30 mg OverallScore74
30 mg of PABA per serving comes at a high cost per 100 mg. PABA is named, but no purity grade is specified. The Other Ingredients include titanium dioxide.
How this ingredient is rated
Active Ingredient Quality & Bioavailability80
PABA is named, but no pharmaceutical grade or high-purity designation is given.
PABA Source & Grade
PABA is named without a stated purity grade.
Dose, Safety & Label Transparency85
The amount is clearly stated at 30 mg per serving. The Other Ingredients include titanium dioxide.
PABA Dosage Alignment
The serving supplies 30 mg of PABA.
Label Disclosure Clarity
The PABA amount is separately stated as 30 mg per serving.
Additive and Excipient Quality
The Other Ingredients include titanium dioxide.
Value40
The cost per 100 mg of PABA is high.
Price per 100mg PABA
The cost per 100 mg of PABA is high.
Vitamin A (Vitamin A Palmitate) · 7500 IU OverallScore61
A serving provides 7500 IU of vitamin A, with a moderate cost for the amount supplied. It uses Retinyl Palmitate, a preformed form with less regulation by the body.
How this ingredient is rated
Active Ingredient Quality & Bioavailability30
Retinyl Palmitate is preformed vitamin A, which is less regulated by the body and carries a higher toxicity risk.
Vitamin A Chemical Form & Source
Retinyl Palmitate is preformed vitamin A, which is less regulated by the body and carries a higher toxicity risk.
Dose, Safety & Label Transparency82
The serving provides 7500 IU of vitamin A. Retinyl Palmitate is named, but a source percentage is not specified.
Dosage Efficacy & Safety Thresholds
The serving provides 7500 IU of vitamin A.
Label Transparency of Specific Forms
Retinyl Palmitate is named, but a source percentage is not specified.
Value80
The cost per 5,000 IU of vitamin A is moderate.
Price per 5,000 IU Dose
The cost per 5,000 IU of vitamin A is moderate.
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Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- A double-blind, placebo-controlled, randomised, clinical study on the effectiveness of collagen peptide on osteoarthritis.
- Efficacy and safety of native type II collagen in modulating knee osteoarthritis symptoms: a randomised, double-blind, placebo-controlled trial.
- Healing Process, Pain, and Health-Related Quality of Life in Patients with Venous Leg Ulcers Treated with Fish Collagen Gel: A 12-Week Randomized Single-Center Study.
- Efficacy and Safety of Dietary Undenatured Type II Collagen on Joint and Motor Function in Healthy Volunteers: A Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study.
- The use of a collagen matrix in hard-to-heal venous leg ulcers.
- Dietary intake and blood concentrations of antioxidants and the risk of cardiovascular disease, total cancer, and all-cause mortality: a systematic review and dose-response meta-analysis of prospective studies.
- Scientific Opinion on the substantiation of a health claim related to vitamin C and increasing non haem iron absorption pursuant to Article 14 of Regulation (EC) No 1924/2006.
- Vitamin C Depletion and All-Cause Mortality in Renal Transplant Recipients.
- Associations of Serum Biomarkers of Fruit and Vegetable Intake With the Risk of Cause-Specific Mortality and All-Cause Mortality: A National Prospective Cohort Study.
- Relation between plasma ascorbic acid and mortality in men and women in EPIC-Norfolk prospective study: a prospective population study. European Prospective Investigation into Cancer and Nutrition.
- Effectiveness of sodium bicarbonate and zinc chloride mouthwashes in the treatment of oral mucositis and quality of life in patients with cancer under chemotherapy.
- Zinc supplementation in young children with acute diarrhea in India.
- Associations of mortality with ocular disorders and an intervention of high-dose antioxidants and zinc in the Age-Related Eye Disease Study: AREDS Report No. 13.
- Effects of zinc and probiotic co-supplementation on inflammation, gastrointestinal symptoms, quality of life, and mood in irritable bowel syndrome patients.
- Effect of zinc sulfate supplementation on premenstrual syndrome and health-related quality of life: Clinical randomized controlled trial.
- What did we learn in 35 years of research on nutrition and supplements for age-related macular degeneration: a systematic review.
- Dietary Nutrient Intake and Progression to Late Age-Related Macular Degeneration in the Age-Related Eye Disease Studies 1 and 2.
- Association between late age-related macular degeneration and dietary intake of copper, iron, zinc and selenium: a 2005-2008 NHANES cross-sectional observational study.
- Associations between dietary nutrient intake and the risk of multiple age-related ocular diseases: evidence from longitudinal analysis.
- Dietary habits and dietary nutrient intake in patients with age-related macular degeneration: A case-control study.