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Nature Made L-Lysine, 1000 mg supplement bottle
Nature Made

L-Lysine, 1000 mg Review

What We Researched
1 active ingredient analyzed · 9 inactive ingredients decoded · 5 brand certifications checked · Page generated: Sep 2026
98
Product Score Excellent
95
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Lysine 1000 mg *
Bioavailability Excellent

Absorption Rating

  • L-Lysine Good
Other Ingredients Excellent

Fillers & Additives

  • L-lysine monohydrochloride
  • Cellulose Gel
  • Crospovidone
  • Stearic Acid
  • Silicon Dioxide
  • Croscarmellose Sodium
  • Hydroxypropyl Methylcellulose
  • Magnesium Stearate
  • Polyethylene Glycol Low
Efficacy Excellent

Dosage Analysis

  • L-Lysine 1000 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Lysine 1000 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

L-lysine monohydrochloride Unknown
Cellulose Gel Generally_safe

It is used as a thickening agent to improve the texture of supplements.

Crospovidone Generally_safe

It is used as a binder to help tablets or capsules disintegrate.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Hydroxypropyl Methylcellulose Safe

It is used as a coating for tablets and capsules.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Brand Trust Report
Nature Made

Founded 1971 · West Hills, California, USA · 701 products · naturemade.com

Certifications

5 certifications
Consumerlab Source available Primary evidence
Labdoor Source available Primary evidence
Usp Verified Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence
NSF Certified Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Verified Evidence available Evidence
Coa Availability — Claimed Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Testing Lab Disclosure — True Brand claim; evidence unavailable

Violation History

2 incidents
Lawsuit Presence of toxic plastic chemicals in prenatal multivitamins.2025 Source available Primary source
Recall Specific lots of Nature Made Adult Gummies Multi, Multi + Omega-3, Multi for Her plus Omega-3s, and Super B Complex w/C & Folic Acid2016-06-15 Source available Primary source
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Frequently Asked Questions
Is Nature Made L-Lysine, 1000 mg a good supplement?

Nature Made L-Lysine, 1000 mg received a product quality score of 98/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 60 servings per container. Of the 9 inactive ingredients, 7 are rated safe and 1 ingredient is flagged for review. The manufacturer, Nature Made, holds a brand trust score of 95/100.

What are the ingredients in Nature Made L-Lysine, 1000 mg?

Nature Made L-Lysine, 1000 mg contains 1 active ingredients: L-Lysine (1000 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature Made L-Lysine, 1000 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Nature Made L-Lysine, 1000 mg. Of 9 inactive ingredients, 7 are rated safe. 1 ingredient is flagged for review: Polyethylene Glycol. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Nature Made a trustworthy supplement brand?

Nature Made receives a brand trust score of 95/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1971 and headquartered in West Hills, California, USA, the company offers 701 products in their lineup. Note: Nature Made has 2 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.