L-Lysine 500 mg

L-Lysine 500 mg

Natural Factors4.8 (1,855 ratings)
Format:Capsule Quantity: 90 Capsule(s) · 45 servings
Goals
$9.07 $0.20 per serving
VitacostLowest$9.07iHerb$9.07Amazon$11.96

Product analysis

72 out of 100

L-Lysine 500 mg offers a simple way to add lysine, which contributes to meeting your protein needs.

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

Nutrient Quality40

The lysine form is identified, but its quality cannot be compared confidently. Naming a form alone does not establish how well it works.

Ingredient Transparency100

The amount and form of lysine are clearly disclosed. That makes it straightforward to compare servings with other lysine supplements.

Value For Money80

The cost is favorable for the amount of lysine supplied. That supports its value as a straightforward lysine supplement.

Customer Satisfaction86

Customer feedback is very positive across a substantial number of ratings. That gives a useful picture of satisfaction, without establishing health benefits.

Product Focus71

A single ingredient keeps the formula focused on lysine supplementation. Its contribution to protein adequacy does not establish routine hair or broad immune benefits.

Format
Capsule
Container
90 Capsule(s)
Per serving
$0.20
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
A serving provides 1000 mg of lysine. The estimated cost per gram of lysine is low. A raw material grade claim is recorded, but its type is not specified. Common processing ingredients are recorded.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

The form is L-Lysine Hydrochloride. A raw material grade claim is recorded, but its type is not specified.
Lysine Chemical Form & Sourcing
The form is L-Lysine Hydrochloride.
Purity and Grade Signals
A raw material grade claim is recorded, but its type is not specified.

Dose, Safety & Label Transparency90

A serving provides 1000 mg of lysine. Common processing ingredients are recorded, but their names are not available.
Lysine Dose by Declared Basis
A serving provides 1000 mg of lysine.
Clean Label & Additives
Common processing ingredients are recorded, but their names are not available.

Value80

The estimated cost per gram of lysine is low; it assigns the full serving price to lysine, so it may overstate its cost.
Price Per 1000mg of Lysine
The estimated cost per gram of lysine is low; it assigns the full serving price to lysine, so it may overstate its cost.
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 quality and goal assessments are stronger than the original, 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