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Free-Form L-Lysine 500 mg

Swanson Premium Brand
4.8
★ ★ ★ ★ ★
(3325 ratings)
Lysine 500 mg
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Score85
A clearly dosed lysine-only option that suits targeted amino-acid use. The 500 mg amount is moderate, while the formula offers little support beyond lysine.
How scoring works
Quantity:100 Capsule(s) • (100 servings)
Goals:
Hair Health

Score 85

A clearly dosed lysine-only option that suits targeted amino-acid use. The 500 mg amount is moderate, while the formula offers little support beyond lysine.
How scoring works
$11.09($0.11 per serving)
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Analysis

Lysine contributes to structural proteins and may be most useful for hair when protein intake or iron status is inadequate. The 500 mg serving provides the lower edge of a useful targeted range in a stable, commonly used form.

One capsule supplies the listed serving, keeping daily use simple. The lysine form and amount are disclosed, but no higher purity grade, source, or independent verification is provided.

The single-ingredient design does not cover mineral, antioxidant, scalp, or hormone-related contributors to hair concerns. It fits targeted supplementation better than someone seeking a complete hair or general wellness formula.

Who is it for
  • Adults seeking a focused lysine supplement
  • People who prefer a premeasured tablet or capsule
  • Users addressing a possible dietary lysine shortfall
Best for
  • Targeted lysine intake
  • Nutritional support when protein or iron status may be inadequate
  • Simple daily supplementation

Pros

  • Clearly identifies 500 mg of lysine per serving
  • Uses l-lysine hydrochloride
  • One-unit serving is easy to follow
  • Supplies a large amount of lysine relative to the container size

Cons

  • The amount sits at the lower end of focused supplementation
  • No purity grade or sourcing details are supplied
  • No complementary hair or immune nutrients are included
  • Hair relevance is strongest when a nutritional shortfall is present

Warnings

  • The 500 mg lysine serving may cause stomach discomfort in sensitive users, especially if taken without food.
  • People with significant kidney disease should discuss standalone amino-acid supplementation with their clinician before use.
  • Persistent or sudden hair shedding can have causes that a lysine-only supplement does not address.

Nutrient quality

91 Highest impact

L-lysine hydrochloride provides a stable and well-absorbed amino-acid form. The 500 mg amount is meaningful for focused lysine supplementation.

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Ingredient transparency

82 Highest impact

The lysine form and amount are clearly stated without a proprietary blend. Missing excipient details and complete use directions leave the supplied label information incomplete.

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Customer satisfaction

70 High impact

The supplied aggregate satisfaction average is favorable, while the response volume determines how stable it appears. No comment-level evidence is available to assess repeated complaints or confirm intended-use experiences.

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Value for money

96 Highest impact

The focused dose and simple formula support favorable serving value. The supplied active formula is focused and shows no low-value padding.

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Goals

Hair Health
Impact
High effect
D+ Goal FitB Strength of SupportF CoverageA+ Formula Quality
Lysine · 500 mg

L-lysine at 500 mg provides an essential amino acid used in protein structure and may support iron utilization. Human evidence for direct hair growth is limited and benefits are most plausible when diet or iron status is inadequate.

The amount provides a moderate contribution rather than a full targeted dose. The single-active design is clear but covers only one structural pathway.

Study evidence
Lysine Supportive 1 study

Ingredients

IngredientAmount per serving
L-Lysine (L-Lysine Hydrochloride)
500 mg
Adults 18–50
Report overview
B- Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyB+ Value

The 500 mg dose uses the stable hydrochloride form and reaches the target amount in one capsule. Its cost per active amount is favorable for routine use. No purity-grade or sourcing claim is supplied, and the missing inactive-ingredient list limits assessment of additives.

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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