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L-Lysine Powder

product on market Powder Source Naturals Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · grounded in 1 source · methodology

L-Lysine Hydrochloride is an essential amino acid used to support protein synthesis and calcium absorption. Research provides moderate evidence that it may help reduce the frequency and duration of herpes simplex outbreaks. Clinical data suggests it is generally well-tolerated when taken at recommended dosages.

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

Label

Product Label

Label for L-Lysine Powder
Open Full PDF View on NIH DSLD →
Details

Label Data

0.25 Teaspoon(s)
Serving Size
73
Servings
Amino acid/Protein
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

1.36 Gram(s)
Market median: 4002.0mg (1 products) 21 studies (A:0, B:2)
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested use: 1/4 to 1/2 teaspoon daily between meals.

Warnings & Precautions

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

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

Keep out of the reach of children.

Formulation Notes

Free-from powder

L-Lysine is an essential amino acid which acts as a precursor for several other amino acids, including L-citrulline (needed in the body for normal protein metabolism) and L-carnitine (needed for fat 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, corn, soy or wheat. Contains starch, salt, preservatives, or artificial color, flavor or fragrance.

Metadata

Product Details

UPC / SKU0 21078 00135 5
DSLD Entry Date2023-09-25
Product TypeAmino acid/Protein
FormPowder
DSLD ID295947
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
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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.