L-Lysine 500 mg

L-Lysine 500 mg

Natural Factors4.8 (1,855 ratings)
Format:Capsule Quantity: 180 Capsule(s) · 90 servings
Goals
$14.67 $0.16 per serving
iHerbLowest$14.67Amazon$14.67Vitacost$14.67

Product analysis

72 out of 100

L-Lysine 500 mg offers lysine, an amino acid used in normal protein nutrition, at a favorable cost.

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

Nutrient Quality40

Lysine has a clearly named hydrochloride source. The source name alone does not establish a quality or absorption advantage.

Ingredient Transparency100

The lysine amount and form are disclosed. That makes the contents straightforward to compare.

Value For Money80

Lysine compares favorably on cost for the declared amount. It offers an economical way to buy this single ingredient.

Customer Satisfaction86

Customer ratings are strongly favorable. A large review pool makes that satisfaction pattern more established without proving hair or immune benefits.

Product Focus71

A single ingredient keeps the formula focused, but expected benefits need careful limits. Adequate protein nutrition is relevant to hair, while the immune evidence does not establish broad respiratory support.

Format
Capsule
Container
180 Capsule(s)
Per serving
$0.16
Customer rating
4.8 · 1,855 ratings
Report analysis

Goals

Hair Health
Hair Health
Impact
Highest effect
A+ Ingredient FitD+ PathwaysB+ EvidenceA+ Formulation Logic
Lysine · 1000 mg
Study evidence
Lysine Supportive 1 study
Immunity
Immunity
Impact
Moderate effect
B Ingredient FitF PathwaysC EvidenceA+ Formulation Logic
Study evidence
Lysine Supportive 2 studies

Ingredients

IngredientAmount per servingScore
L-Lysine (L-Lysine Hydrochloride)
 1000 mg 92
Gluten Free Adults 18–50 Vegan Dairy Free Sugar Free Vegetarian
Report overview
Lysine (L-Lysine Hydrochloride) · 1000 mg OverallScore92
A+ Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyB+ Value
Each serving lists 1000 mg of lysine, with a moderate cost per amount of lysine. The source is L-Lysine Hydrochloride. A purity grade is claimed.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

The source is L-Lysine Hydrochloride. A purity grade is claimed.
Lysine Chemical Form & Sourcing
The source is L-Lysine Hydrochloride.
Purity and Grade Signals
A purity grade is claimed.

Dose, Safety & Label Transparency90

Each serving lists 1000 mg of lysine. The formula includes common added processing ingredients.
Lysine Dose by Declared Basis
The serving lists 1000 mg of lysine.
Clean Label & Additives
The formula includes common added processing ingredients.

Value80

The cost per amount of lysine is moderate.
Price Per 1000mg of Lysine
The cost per amount of lysine is moderate.
View ingredientView products
86 Performance

L-Lysine 500 mg

Carlson
A clearly stated L-lysine hydrochloride dose at 500 mg provides a focused source of this essential amino acid. The provided quality and goal assessments are stronger than the original, although the provided data do not include independent testing or certification details.
86 Performance

L-Lysine 500 mg

Source Naturals
A clearly stated L-lysine hydrochloride dose at 500 mg provides a focused source of this essential amino acid. The provided quality and goal assessments are stronger than the original, although the provided data do not include independent testing or certification details.
85 Performance

Free-Form Lysine 500 mg

Swanson
A clearly stated L-lysine hydrochloride dose at 500 mg provides a focused source of this essential amino acid. The provided collection and goal assessments are well aligned with immunity and hair-support needs, although the provided data do not include independent testing or certification details.
86 Budget

L-Lysine 1000 mg

AN Amazing Nutrition Amazing Formulas
A clearly stated L-lysine hydrochloride dose at 1000 mg provides a focused source of this essential amino acid. Its lower serving cost improves routine value compared with the original, although the provided data do not include independent testing or certification details.
86 Budget

L-Lysine Powder 960 mg

Carlson
A clearly stated L-lysine hydrochloride dose at 960 mg provides a focused source of this essential amino acid. Its lower serving cost improves routine value compared with the original, although the provided data do not include independent testing or certification details.
86 Budget

L-Lysine 1000 mg

Solgar
A clearly stated L-lysine hydrochloride dose at 1000 mg provides a focused source of this essential amino acid. Its lower serving cost improves routine value compared with the original, although the provided data do not include independent testing or certification details.
84 Value

L-Lysine 600 mg

21st Century
A clearly stated L-lysine hydrochloride dose at 600 mg provides a focused source of this essential amino acid. Strong provided quality and goal assessments combine with favorable serving economics, improving the balance of formulation and value; the small calcium addition makes the formula slightly less minimal.
85 Value

L-Lysine Pharmaceutical Grade

Swanson
A clearly stated L-lysine hydrochloride dose at 500 mg provides a focused source of this essential amino acid. Strong provided quality and goal assessments combine with favorable serving economics, improving the balance of formulation and value; the provided data do not include independent testing or certification details.
86 Value

L-Lysine 500 mg

NOW
A clearly stated L-lysine hydrochloride dose at 500 mg provides a focused source of this essential amino acid. Strong provided quality and goal assessments combine with favorable serving economics, improving the balance of formulation and value; the provided data do not include independent testing or certification details.
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
  2. Lysine-fortified wheat flour improves the nutritional and immunological status of wheat-eating families in northern China.
    Zhao W; Zhai F; Zhang D; An Y; Liu Y; He Y; Ge K; Scrimshaw NS · Food and nutrition bulletin · 2004
    Clinical trial264 participantsImmunity forLysine
  3. Success of L-lysine therapy in frequently recurrent herpes simplex infection. Treatment and prophylaxis
    R S Griffith, D E Walsh, K H Myrmel, R W Thompson, A Behforooz · Dermatologica · 1987
    Non-randomized trial52 participantsImmunity forLysine