Longer Stronger Hair and Nails
Goals
$19.99 $0.66 per serving
Product analysis
Longer Stronger Hair and Nails may help brittle nails, with limited evidence for biotin. Hair benefits are most plausible when a zinc or biotin shortfall contributes to shedding.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality32
Manganese citrate is a favorable identified form, while copper and horsetail offer less clarity about a quality advantage. Several other forms and the proprietary blend contents are unspecified.
Ingredient Transparency65
All listed amounts are disclosed, helping compare servings. Half the forms and the proprietary blend composition are omitted.
Value For Money44
Biotin offers moderate value, while proline is expensive for the amount supplied. Copper and manganese are moderately priced, with the other contributions too uncertain for a confident value conclusion.
Customer Satisfaction79
Customer feedback is positive across more than a thousand reviews. The substantial review history gives a useful picture of satisfaction.
Product Focus26
The clearest uses concern brittle nails and nutrient-related hair shedding, with limited evidence for routine improvement. An incompletely described blend leaves some individual contributions uncertain.
- Format
Softgel - Container
- 60 Softgel(s)
- Per serving
- $0.66
- Also available
Longer Stronger Hair and Nails$34.99- Customer rating
- 4.6 · 1,277 ratings
Goals
Impact
High effect
Biotin · 2600 mcgHorsetail · 160 mg
Biotin may help brittle nails, but the supporting studies were small and mostly uncontrolled, so durable improvements in nail strength are uncertain. The declared serving meets or exceeds the amount used in those studies; higher amounts do not establish a greater benefit. Zinc can help nail changes caused by zinc deficiency, without established extra benefit when zinc intake is adequate.
How this product is rated for Nail Health
Ingredient fit66
Biotin provides the clearest nail-specific connection, with other ingredients and their amounts shaping how focused the formula is.
Goal fit
The formula includes ingredients recognized for this goal alongside ingredients aimed at other uses.
Dose adequacy
Biotin meets the study-linked amount comparison, while other recognized ingredients have lower amount coverage.
Pathways70
The saved findings distinguish keratin-related cofactors, matrix support and structural protein supply; coverage is described separately below.
Depth
The strongest saved route concerns cofactors involved in forming nail keratin, led by biotin where its amount qualifies.
Breadth
Only the keratin-related cofactor route reaches the coverage criterion; structural protein supply and matrix support remain limited.
Evidence97
The saved ingredient and preparation findings must be read alongside the limited nail-specific human evidence.
Evidence strength
Biotin leads the saved finding, with expectations limited by small, mostly uncontrolled nail studies.
Studied preparation
Preparation matching is incomplete for Horsetail, limiting transfer from the studied materials.
Formulation logic100
The recognized ingredients need no missing partner, and no specified conflict was triggered.
Partner coverage
No required partner is missing for the recognized ingredients; this does not establish an added combination benefit.
Conflicts
None of the specified conflicts was triggered in the supplied findings.
Effective doses
All recognized ingredients reach the comparison’s minimum amount criterion, which is not a guarantee of nail improvement.
Horsetail Not classified
No linked studies yet.
Impact
High effect
Biotin · 2600 mcgZinc · 10 mgLysine · 80 mgVitamin C · 200 mg
Zinc and biotin can help when inadequate intake or deficiency contributes to diffuse shedding. This connection concerns filling a nutritional gap; larger amounts do not establish extra regrowth when intake is adequate. Horsetail is not interchangeable with the specific silicon preparation studied for fine hair; its mass does not establish an equivalent silicon exposure.
How this product is rated for Hair Health
Ingredient fit63
Relevant amounts provide partial coverage of the comparison references; any unresolved amounts limit how closely the serving can be compared.
Goal fit
Hair-related nutrients share the formula with ingredients serving broader purposes, so its focus on hair is limited.
Dose adequacy
Relevant amounts provide partial coverage of the comparison references; any unresolved amounts limit how closely the serving can be compared.
Pathways16
Antioxidant-related nutrient roles form the strongest recognized route, but biological protection alone does not establish improved hair growth.
Depth
Antioxidant-related nutrient roles form the strongest recognized route, but biological protection alone does not establish improved hair growth.
Breadth
No route reaches the coverage reference, so the formula does not establish broad coverage of direct hair mechanisms.
Evidence95
Zinc supplies the leading evidence contribution, with useful expectations centred on deficiency-related shedding rather than routine regrowth.
Evidence strength
Zinc supplies the leading evidence contribution, with useful expectations centred on deficiency-related shedding rather than routine regrowth.
Studied preparation
Horsetail does not match an identified studied preparation; the other qualifying ingredients meet the preparation criteria.
Formulation logic100
All ingredients retained in the amount comparison reach its minimum reference, which is not a proven hair-growth threshold. No required partner is missing and no listed ingredient conflict is triggered.
Partner coverage
No recognized ingredient is limited by a missing required partner; this does not establish added benefit from combining them.
Conflicts
No evaluated ingredient combination triggers a listed conflict; the supplied findings do not establish overall suitability.
Effective doses
All ingredients retained in the amount comparison reach its minimum reference, which is not a proven hair-growth threshold.
Horsetail Not classified
No linked studies yet.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Calories | 20 Calorie(s) | |
Total Fat | 1 Gram(s) | |
Protein | 1 Gram(s) | |
Vitamin C (Calcium Ascorbate) | 200 mg | |
Biotin | 2600 mcg | |
Calcium | 30 mg | |
Zinc (Zinc Picolinate) | 10 mg | |
Copper (Copper Amino Acid Chelate) | 1 mg | |
Manganese (Manganese Citrate) | 5 mg | |
Flaxseed Oil | 1058 mg | |
Gotu Kola extract (Triterpenes) | 180 mg | |
Horsetail extract (Silica) | 160 mg | |
Citrus extract (Bioflavonoids) | 100 mg | |
Lysine (Lysine Hydrochloride) | 80 mg | |
Proline | 80 mg | |
BioPerine Complex | 12 mg |
Copper (Copper Amino Acid Chelate) · 1 mg OverallScore68
Each serving provides 1 mg of copper as an amino acid chelate. The 10 mg of zinc gives a zinc-to-copper balance that aligns with the evaluation, though the specific chelate is not identified.
How this ingredient is rated
Active Ingredient Quality & Bioavailability58
The label names copper amino acid chelate and gives the copper amount. Its more specific chemistry and comparative absorption are not established in the supplied evaluation.
Copper Form Bioavailability
Copper Amino Acid Chelate is named, but its more specific chemistry and comparative absorption are not established in the supplied evaluation.
Elemental Copper Labeling Clarity
The copper row lists 1 mg per serving and names copper amino acid chelate as its source.
Dose, Safety & Label Transparency86
The serving provides 1 mg of copper. The 10:1 zinc-to-copper ratio aligns with the evaluation’s preferred balance.
Copper Dosage Safety & Efficacy
The serving provides 1 mg of copper.
Zinc-to-Copper Balance
10 mg of zinc and 1 mg of copper give a 10:1 ratio, which aligns with the evaluation’s preferred balance.
Value50
A whole-product serving costs about $0.67, making it a mid-priced choice in this comparison.
Price Per Serving Efficiency
A whole-product serving costs about $0.67, making it a mid-priced choice in this comparison.
Manganese (Manganese Citrate) · 5 mg OverallScore82
A serving of 2 softgels provides 5 mg of manganese from manganese citrate. The whole product costs about $0.67 per serving.
How this ingredient is rated
Active Ingredient Quality & Bioavailability80
The source is manganese citrate.
Manganese Chemical Form
The source is manganese citrate.
Dose, Safety & Label Transparency100
A serving of 2 softgels provides 5 mg of manganese. The evaluation does not flag an exceeded limit for this serving; other sources of manganese are not assessed.
Manganese Dosage Efficacy & Safety
A serving of 2 softgels provides 5 mg of manganese. The amount falls within the range emphasized by this comparison. No limit is flagged as exceeded.
Elemental Weight Disclosure
The 5 mg per serving refers to manganese; its source is also named.
Value50
The whole product costs about $0.67 per serving.
Price per Serving vs. Median
The whole product costs about $0.67 per serving.
Biotin · 2600 mcg OverallScore75
Each serving lists 2,600 mcg of biotin, a substantial amount for the evaluation’s hair and nail focus. The product’s ingredient information also flags artificial colors.
How this ingredient is rated
Active Ingredient Quality & Bioavailability74
The ingredient is listed as biotin without a specific isomer being identified. The ingredient check flags artificial colors. The added sugar amount is not available in the saved facts.
Biologically Active d-Biotin Isomer
The ingredient is listed as biotin without a specific isomer being identified.
Excipient Purity
The ingredient check flags artificial colors. The added sugar amount is not available in the saved facts.
Dose, Safety & Label Transparency84
The label specifies 2,600 mcg of biotin per serving, a substantial amount for the evaluation’s hair and nail focus.
Biotin Potency for Health Goals
A serving provides 2,600 mcg of biotin, a substantial amount for the evaluation’s hair and nail focus.
Label Transparency & Exact Disclosure
The biotin amount is explicitly listed as 2,600 mcg per serving.
Value60
The whole-product cost corresponds to about $1.28 per 5,000 mcg of labeled biotin. The evaluation also accounts for other listed vitamins and minerals sharing the product cost.
Price per 5,000 mcg Biotin
The whole-product cost corresponds to about $1.28 per 5,000 mcg of labeled biotin. The evaluation also accounts for other listed vitamins and minerals sharing the product cost.
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.
- Menkes disease and response to copper histidine: An Indian case series.
- Trace element levels in alopecia areata.
- UV damage to hair and the effect of antioxidants and metal chelators.
- Preserving fibre health: reducing oxidative stress throughout the life of the hair fibre.
- Causes of hair loss and the developments in hair rejuvenation.
- Management of hair loss associated with endocrine therapy in patients with breast cancer: an overview.
- Elucidating causal relationships of diet-derived circulating antioxidants and the risk of non-scarring alopecia: A Mendelian randomization study.
- Alterations of plasma antioxidants and mitochondrial DNA mutation in hair follicles of smokers.
- Removal of synthetic hair dye using formamidine sulfinic acid and other sulfinate precursors.
- A Zinc Sulphate-Resistant Acrodermatitis Enteropathica Patient with a Novel Mutation in SLC39A4 Gene.
- The effects of minoxidil, 1% pyrithione zinc and a combination of both on hair density: a randomized controlled trial.
- Incubatory environment of the scalp impacts pre-emergent hair to affect post-emergent hair cuticle integrity.
- A comparison of hair quality and cosmetic acceptance following the use of two anti-dandruff shampoos.
- BMI and levels of zinc, copper in hair, serum and urine of Turkish male patients with androgenetic alopecia.
- Analysis of serum zinc and copper concentrations in hair loss.
- Biotin for the treatment of nail disease: what is the evidence?