Best L-Lysine Supplements 2026: Cost per Effective Dose
Top pick for L-Lysine: Nutricost L-Lysine Powder (500 g) — 1000mg L-lysine per 1 scoop (1 g), Manufactured in a GMP facility, $0.10/day. Our best-value pick.
All L-Lysine Supplements Compared
All 5 products sorted by cost per clinically-effective daily dose (lowest first). Dose, certification, and pricing verified against NIH DSLD and manufacturer data.
| Product | Brand | Dose / Serving | Cost / Day | Certification | Pick | Buy |
|---|---|---|---|---|---|---|
| Nutricost L-Lysine Powder (500 g) | Nutricost | 1000mg L-lysine / 1 scoop (1 g) | $0.10 | Manufactured in a GMP facility | Best Value | Buy |
| BulkSupplements.com L-Lysine Powder (500 g) | BulkSupplements | 1000mg L-lysine / 1 g (1,000 mg, per label) | $0.12 | Manufactured in a GMP facility | Buy | |
| Nutricost L-Lysine 1,000 mg (240 Tablets) | Nutricost | 1000mg L-lysine / 1 tablet | $0.25 | Manufactured in a GMP facility | Buy | |
| Solgar L-Lysine 1,000 mg (250 Tablets) | Solgar | 1000mg L-lysine / 1 tablet | $0.28 | Manufactured in a GMP facility | Buy | |
| Nature's Bounty L-Lysine 1,000 mg (60 Tablets) | Nature's Bounty | 1000mg L-lysine / 1 tablet | $0.35 | Manufactured in a GMP facility | Buy |
In-Depth L-Lysine Guides
Go deeper on l-lysine — by goal, by form, and what the evidence actually supports:
Our Picks
Best Value: Nutricost L-Lysine Powder (500 g)
1000mg L-lysine per 1 scoop (1 g). Manufactured in a GMP facility. $0.10/day. 500 servings per container at $15.95.
How We Rank L-Lysine Supplements
Every product is evaluated on three criteria:
- Cost per day. Not cost per pill or cost per bottle — what it actually costs per day at the product's labelled serving. Where a category's servings differ in strength we flag it above the table, because cost per day is only comparable when the doses are.
- Third-party certification. USP Verified, NSF Certified for Sport, and ConsumerLab Approved indicate independent testing for purity, potency, and contaminants.
- Bioavailable form. We prioritize products using the specific chemical form shown to be most effective in published research.
Rankings are not influenced by affiliate commissions. We earn the same commission regardless of which product you choose. Read our full methodology.
Personalize Your L-Lysine Choice
Not sure which l-lysine supplement is right for you? Use our free tools:
- DNA Supplement Analyzer — upload 23andMe or AncestryDNA data to check for genetic variants affecting l-lysine metabolism. Runs entirely in your browser.
- Lab Results Interpreter — enter your blood test values to get personalized dosing recommendations.
- Supplement Stack Builder — build a complete protocol based on your age, sex, medications, and goals.
- Supplement Audit — already taking l-lysine? Check if you have the right form and dose.
Browse All Supplement Categories
ElectrolytesFiberVitamin K2 (MK-7)BeetrootPsyllium HuskTaurineMCT OilCranberryD-MannoseBeta-CaroteneVitamin KChromiumBoswelliaB-ComplexPQQMagnesium GlycinateVitamin D3Omega-3 Fish OilBerberineMyo-InositolNAC (N-Acetylcysteine)Curcumin (Turmeric)GlucosamineChondroitinSAMeSeleniumCreatineCoQ10CollagenBiotinMultivitaminProteinVitamin B12Calcium CitrateIron BisglycinateVitamin CMethylfolateProbioticsAshwagandhaTongkat AliL-TheanineZincMagnesium CitrateMagnesium L-ThreonateAlgal Omega-3Alpha-GPCAlpha-Lipoic AcidAstaxanthinBeta-AlanineBetaine HClBetaine (TMG)BoronBCAAsBromelainCarnosineCholineCiticolineCitrus BergamotCLACod Liver OilColostrumCopperCordycepsDigestive EnzymesElderberryEAAFisetinFlaxseed OilGABAGarlicGinkgo BilobaPanax GinsengGlucomannanGlutathioneGlycineGrape Seed ExtractHMBHyaluronic AcidIodineKrill OilL-ArginineL-CarnitineL-CitrullineL-GlutamineL-TyrosineLactoferrinLion's ManeLutein & ZeaxanthinManganeseMelatoninMilk ThistleMSMNMNPhosphatidylserinePine Bark ExtractQuercetinRhodiola RoseaSaffronSaw PalmettoShilajitSpermidineSpirulinaTocotrienolsL-TryptophanVitamin AVitamin B6Vitamin E