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L-Lysine 1,000 mg

product on market Tablet or Pill Source Naturals Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

L-lysine is an essential amino acid used in the body for protein synthesis and calcium absorption. There is moderate evidence suggesting it may help reduce the frequency of herpes simplex outbreaks. Research on its broader health benefits remains limited.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for L-Lysine 1,000 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
50
Servings
Amino acid/Protein
Product Type
50%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Calories
5 Calorie(s)
Market median: 4002.0mg (1 products) 21 studies (A:0, B:2)

Other Ingredients

Stearic Acid Sorbitol Colloidal Silicon Dioxide Modified Cellulose Gum Magnesium Stearate
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested use: 1 tablet daily.

Warnings & Precautions

Note: If you are pregnant, may become pregnant, or breast feeding, consult your health care professional before using this product.

Do not use if tamper-evident seal is broken or missing.

Keep out of the reach of children.

Formulation Notes

Free form L-lysine

L-lysine is an essential free-form amino acid which acts as a precursor for other amino acids, including l-carnitine (needed for metabolism) L-lysine is crucial for the formation of collagen, a major part of the body's connective tissues. L-lysine also contributes to energy production when converted to acetyl coenzyme A, one of the principal fuels for the Krebs cycle.

Suitable for vegetarians.

Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.

Metadata

Product Details

UPC / SKU0 21078 00141 6
DSLD Entry Date2023-08-23
Product TypeAmino acid/Protein
FormTablet or Pill
DSLD ID295943
Data Updated2026-04-11
Research

Research Evidence

3
Research Sources
74
Avg Quality
3
Meta Analysis
A Antifibrinolytics (lysine analogues) for the prevention of bleeding in people with haematological disorders
Meta Analysis The Cochrane database of systematic reviews 2026 PubMed DOI
B Antifibrinolytics (lysine analogues) for the prevention of bleeding in people with haematological disorders
Meta Analysis The Cochrane database of systematic reviews 2016 PubMed DOI
B Antifibrinolytics (lysine analogues) for the prevention of bleeding in patients with haematological disorders
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
View all evidence for Lysine →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.