L-Lysine 500 mg

L-Lysine 500 mg

Jarrow Formulas4.8 (4,286 ratings)
Format:Capsule Quantity: 100 Capsule(s) · 100 servings
Goals

Product analysis

76 out of 100

L-Lysine 500 mg offers an economical way to add an amino acid used in protein nutrition. Any hair benefit remains uncertain because the relevant evidence concerns combinations used by people with low iron stores.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality40

The lysine form is identified, but its relative quality cannot be judged confidently. Naming the form alone does not establish a special absorption advantage.

Ingredient Transparency100

The lysine amount and form are both stated. That clarity makes the supplement easy to compare with other single-ingredient options.

Value For Money100

The lysine offers favorable value for the amount supplied. The price information is older, so the current comparison is less certain.

Customer Satisfaction90

Customer feedback is strongly positive across thousands of ratings. The sizeable response base gives a broad picture of satisfaction without establishing hair benefits.

Product Focus71

The simple formula supplies lysine without additional active ingredients. Hair-related findings concern particular combinations and low iron stores, so an independent hair-growth benefit is uncertain.

Format
Capsule
Container
100 Capsule(s)
Per serving
$0.06
Customer rating
4.8 · 4,286 ratings
Report analysis

Goals

Hair Health
Impact
High effect
B+ Ingredient FitF PathwaysB+ EvidenceA+ Formulation Logic
Lysine · 500 mg

Lysine is an amino acid relevant to protein adequacy. The supplied support concerns selected combination regimens in people with low ferritin, which does not establish an independent routine hair benefit. The 500 mg per serving partly matches the supplied amount reference without establishing a proven hair-growth dose.

How this product is rated for Hair Health

Ingredient fit80

Lysine is a principal contributor to this formula’s hair comparison. The counted amounts provide partial matches to the supplied references, limiting their contribution.
Goal fit
The counted ingredient selection is focused, although links to other goals limit its hair-specific focus.
Dose adequacy
The counted amounts provide partial matches to the supplied references, limiting their contribution.

Pathways15

Hair-fibre building blocks is the strongest represented route; this biological connection alone does not establish hair regrowth. None of the listed routes reaches the coverage threshold, leaving limited breadth.
Depth
Hair-fibre building blocks is the strongest represented route; this biological connection alone does not establish hair regrowth.
Breadth
None of the listed routes reaches the coverage threshold, leaving limited breadth.

Evidence83

Lysine provides the strongest evidence contribution among the counted ingredients; that finding retains the supplied clinical limitations. The counted forms match the supplied preparation criteria; this does not establish independent hair regrowth for every ingredient.
Evidence strength
Lysine provides the strongest evidence contribution among the counted ingredients; that finding retains the supplied clinical limitations.
Studied preparation
The counted forms match the supplied preparation criteria; this does not establish independent hair regrowth for every ingredient.

Formulation logic100

The counted ingredients have no unmet partner requirement; this does not establish an extra benefit from combining them. All counted ingredients reach the minimum amount threshold used here; it is not a proven effective hair-growth dose.
Partner coverage
The counted ingredients have no unmet partner requirement; this does not establish an extra benefit from combining them.
Conflicts
No listed ingredient conflict was identified in the supplied checks.
Effective doses
All counted ingredients reach the minimum amount threshold used here; it is not a proven effective hair-growth dose.
Study evidence
Lysine Supportive 1 study

Ingredients

IngredientAmount per servingScore
L-Lysine (L-Lysine Hydrochloride)
500 mg 85
Adults 18–50
Report overview
B- Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyA+ Value
Each serving provides 500 mg of lysine. The identified form is L-Lysine Hydrochloride.
How this ingredient is rated

Active Ingredient Quality & Bioavailability72

The identified form is L-Lysine Hydrochloride. No grade or sourcing claim is identified in the available facts.
Lysine Chemical Form & Sourcing
The identified form is L-Lysine Hydrochloride.
Purity and Grade Signals
The available facts do not identify a grade, vegan or fermentation source, or GMP claim.

Dose, Safety & Label Transparency90

The label states 500 mg of lysine per serving. A common excipient is identified.
Lysine Dose by Declared Basis
The label states 500 mg of lysine per serving.
Clean Label & Additives
The evaluation identifies a common excipient in the overall formula.

Value100

Based on the whole-product price, the cost is about $0.13 per gram of lysine.
Price Per 1000mg of Lysine
Based on the whole-product price, the cost is about $0.13 per gram of lysine.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Causes of hair loss and the developments in hair rejuvenation.
    Rushton DH; Norris MJ; Dover R; Busuttil N · International journal of cosmetic science · 2010
    Narrative reviewHair Health forLysine