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L-Carnitine 500 mg

Jarrow Formulas
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(1671 ratings)
L-Carnitine 500 mg
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Score85
500 mg of L-carnitine tartrate offers strong ongoing value, but the focused formula has limited pathway coverage.
How scoring works
Quantity:100 Veggie Cap(s) • (100 servings)
Goals:
Cardiovascular Support

Score 85

500 mg of L-carnitine tartrate offers strong ongoing value, but the focused formula has limited pathway coverage.
How scoring works

Also available as

1 option
50 servings L-Carnitine 500 mg • 50 Veggie Cap(s) • 50 servings $18.99 ($0.37 per serving)
$32.99($0.32 per serving)
Daily Vita
$ 32.99
Amazon
$ 36.94
iHerb
$ 38.54
Vitacost
$ 35.39
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Analysis

The tartrate form is appropriate for exercise-recovery use and states the active amount directly. The 500 mg serving is presented in a vegetable capsule format for routine use.

No branded raw material is identified, and 500 mg is below many gram-level servings used in targeted cardiovascular research. Benefits are most likely when carnitine support is relevant rather than as a universal performance or heart-health effect.

The formula stays focused on fatty-acid transport and cellular energy rather than broad cardiovascular or performance coverage. Strong ongoing value and 100 servings shape the practical appeal.

Who is it for
  • Adults seeking a simple carnitine supplement
  • Users seeking maintenance-level cellular-energy support
Best for
  • Focused fatty-acid transport support
  • Value-conscious carnitine use

Pros

  • Provides 500 mg per labeled serving
  • Clearly identifies L-carnitine tartrate
  • Vegetable capsule format
  • Strong ongoing value

Cons

  • No independent purity or testing standard is disclosed
  • No branded raw-material source is identified
  • Supports a narrow metabolic pathway rather than broad cardiovascular coverage

Nutrient quality

88 Highest impact

L-carnitine tartrate provides a clear maintenance amount in an exercise-oriented form. No branded purity source or non-active ingredient list is supplied.

Ingredient transparency

87 Highest impact

Active complex amounts and serving details are stated clearly. No branded purity source or non-active ingredient list is supplied.

Customer satisfaction

71 High impact

The supplied average rating is strong, and a very large response volume makes the average rating more stable. No comment-level feedback is supplied to judge recurring complaints or purpose-specific experiences.

Value for money

90 Highest impact

The larger count improves serving value for ongoing use. Formula focus and disclosure determine whether that value holds up in practice.

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Goals

Cardiovascular Support
Cardiovascular Support
Impact
Moderate effect
C Goal FitC Strength of SupportF CoverageA- Formula Quality
L-Carnitine · 500 mg

L-carnitine supports fatty-acid transport and cellular energy, giving it a plausible cardiac-energy role. The tartrate form is clearly named, but the amount is modest for targeted cardiovascular use.

Human evidence for heart outcomes is mixed and less direct than evidence for omega-3s or CoQ10. A focused single-active design provides depth only in energy metabolism.

Study evidence
L-Carnitine Supportive 73 studies

Ingredients

IngredientAmount per serving
L-Carnitine (L-Carnitine Tartrate)
 500 mg
Gluten Free Adults 18–50 Vegan Dairy Free Vegetarian
Report overview
L-Carnitine (L-Carnitine Tartrate) · 500 mg OverallScore81
B- Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyB+ Value

The tartrate form fits exercise recovery and fitness use well. Its standard maintenance dose is clearly disclosed, but the source carries no recognized branded-purity credential. The larger count delivers favorable cost efficiency for ongoing use.

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82 Performance

L-Carnitine + Tartrate

ALLMAX
L-carnitine tartrate provides a focused amount for exercise recovery and energy metabolism, with pantothenic acid offering compatible support; its form and goal fit provide a clearer option when the original already has a credible carnitine profile. Clear doses, a concise formula, and favorable serving economics make it a practical option despite the missing elemental carnitine yield.
82 Performance

L-Carnitine 500 mg

NOW
L-carnitine tartrate provides a clear maintenance amount in a form well suited to exercise recovery; its form and goal fit provide a clearer option when the original already has a credible carnitine profile. No branded purity source or non-active ingredient list is supplied.
84 Performance

Mega-Liposomal R-ALA Organic Fruit Flavor

Aurora NutraScience
R-alpha lipoic acid, CoQ10, and L-carnitine create a coherent, meaningfully dosed cellular-energy formula; its form and goal fit provide a clearer option when the original already has a credible carnitine profile. Liposomal delivery is promising, but unspecified CoQ10 and carnitine forms plus premium serving value temper the strengths.
87 Budget

L-Carnitine

NOW
L-carnitine tartrate provides a useful maintenance amount in a flexible liquid form; the lower serving cost improves economy when the original already has a credible carnitine profile. No branded purity source or non-active ingredient list is supplied.
83 Budget

L-Carnitine 500 mg

Swanson
L-carnitine base provides a direct maintenance amount with clearly listed calcium; the lower serving cost improves economy when the original already has a credible carnitine profile. No branded purity source or non-active ingredient list is supplied.
84 Budget

L-Carnitine 500 mg

Swanson Premium Brand
L-carnitine base provides a direct and clearly stated maintenance amount; the lower serving cost improves economy when the original already has a credible carnitine profile. No branded purity source or non-active ingredient list is supplied.
87 Value

L-Carnitine 500 mg

NOW
L-carnitine tartrate provides a clear maintenance amount in a form well suited to exercise recovery; the quality-to-cost balance is favorable when the original already has a credible carnitine profile. No branded purity source or non-active ingredient list is supplied.
80 Value

L-Carnitine 500 mg

Natural Factors
L-carnitine tartrate provides a clear maintenance amount in a suitable exercise-oriented form; the quality-to-cost balance is favorable when the original already has a credible carnitine profile. No branded purity source or non-active ingredient list is supplied.
80 Value

L-Carnitine 500 mg

Jarrow Formulas
L-carnitine tartrate provides a clear maintenance amount in an exercise-oriented form; the quality-to-cost balance is favorable when the original already has a credible carnitine profile. No branded purity source or non-active ingredient list is supplied.
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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. The Effects of L-Carnitine Supplementation on Weight Loss, Glycemic Control, and Cardiovascular Risk Factors in Patients With Type 2 Diabetes: A Systematic Review and Dose-response Meta-Analysis of Randomized Controlled Trials.
    Mirrafiei A; Jayedi A; Shab-Bidar S · Clinical therapeutics · 2024
    Meta-analysis2,041 participants21 studies pooledCardiovascular Support forL-Carnitine
  2. Blood Pressure and Metabolic Effects of Acetyl-l-Carnitine in Type 2 Diabetes: DIABASI Randomized Controlled Trial.
    Parvanova A; Trillini M; Podestà MA; Iliev IP; Aparicio C; Perna A; Peraro F; Rubis N; Gaspari F; Cannata A; Ferrari S; Bossi AC; Trevisan R; Parameswaran S; Chávez-Iñiguez JS; Masnic F; Seck SM; Jiamjariyaporn T; Cortinovis M; Perico L; Sharma K; Remuzzi G; Ruggenenti P; Warnock DG · Journal of the Endocrine Society · 2022
    Randomized trial229 participantsCardiovascular Support forL-Carnitine
  3. Effective dosing of L-carnitine in the secondary prevention of cardiovascular disease: a systematic review and meta-analysis.
    Shang R; Sun Z; Li H · BMC cardiovascular disorders · 2015
    Meta-analysis3,108 participants5 studies pooledCardiovascular Support forL-Carnitine
  4. Intestinal microbiota metabolism of L-carnitine, a nutrient in red meat, promotes atherosclerosis.
    Koeth RA; Wang Z; Levison BS; Buffa JA; Org E; Sheehy BT; Britt EB; Fu X; Wu Y; Li L; Smith JD; DiDonato JA; Chen J; Li H; Wu GD; Lewis JD; Warrier M; Brown JM; Krauss RM; Tang WH; Bushman FD; Lusis AJ; Hazen SL · Nature medicine · 2013
    Other2,595 participantsCardiovascular Support forL-Carnitine
  5. Associations of circulating choline and its related metabolites with cardiometabolic biomarkers: an international pooled analysis.
    Pan XF; Yang JJ; Shu XO; Moore SC; Palmer ND; Guasch-Ferré M; Herrington DM; Harada S; Eliassen H; Wang TJ; Gerszten RE; Albanes D; Tzoulaki I; Karaman I; Elliott P; Zhu H; Wagenknecht LE; Zheng W; Cai H; Cai Q; Matthews CE; Menni C; Meyer KA; Lipworth LP; Ose J; Fornage M; Ulrich CM; Yu D · The American journal of clinical nutrition · 2021
    Meta-analysis32,853 participants17 studies pooledCardiovascular Support forL-Carnitine
  6. L-Carnitine supplementation reduces oxidized LDL cholesterol in patients with diabetes.
    Malaguarnera M; Vacante M; Avitabile T; Malaguarnera M; Cammalleri L; Motta M · The American journal of clinical nutrition · 2009
    Randomized trial81 participantsCardiovascular Support forL-Carnitine
  7. L-Carnitine's Effect on the Biomarkers of Metabolic Syndrome: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
    Choi M; Park S; Lee M · Nutrients · 2021
    Meta-analysis9 studies pooledCardiovascular Support forL-Carnitine
  8. The Effects of L-Carnitine on Echocardiographic Changes in Patients With β-Thalassemia Major and Intermedia.
    Shahidi M; Hashemi SR; Fattahi N; Roshani D; Vahedi S; Sharifi P; Moradveisi B · Journal of pediatric hematology/oncology · 2020
    Randomized trial60 participantsCardiovascular Support forL-Carnitine
  9. Efficacy and tolerability of combined treatment with L-carnitine and simvastatin in lowering lipoprotein(a) serum levels in patients with type 2 diabetes mellitus.
    Solfrizzi V; Capurso C; Colacicco AM; D'Introno A; Fontana C; Capurso SA; Torres F; Gadaleta AM; Koverech A; Capurso A; Panza F · Atherosclerosis · 2007
    Randomized trial52 participantsCardiovascular Support forL-Carnitine