Best L-Carnitine / ALCAR products by transparent scoring (2026)
Single-ingredient products scored by public rules: dose fit, label transparency, data verification, company transparency, third-party testing. Not a measure of efficacy or safety. No paid placement.
Products ranked: 83 · Reference range: 217 – 2,000 mg (source) · Updated 2026-11-01
Reference range: derived from the cited reference values; see the methodology.
Single-ingredient products only.
Left out of this list: combination products (a single-ingredient list exists) (37)
Dose fit 40 · Label transparency 20 · Data verification 15 · Company transparency 15 · Third-party test 10 (No data (not scored); the other four parts are rescaled from 90 to 100) — Methodology · L-Carnitine / ALCAR →
| Rank | Product | Per day | Score | Breakdown | ||||||||||||||||
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| 1 tie |
L-Carnitine Metagenics · US NIH DSLD |
500 mg | 100.0 | Breakdown
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| 1 tie |
L-Carnitine 1000 mg MET-Rx · US NIH DSLD |
2,000 mg | 100.0 | Breakdown
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| 3 tie |
L-Carnitine 500 mg GNC · US NIH DSLD |
500 mg | 97.8 | Breakdown
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| 3 tie |
L-Carnitine Fumarate 450 mg Swanson · US NIH DSLD |
450 mg | 97.8 | Breakdown
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| 5 tie |
Best L-Carnitine Fumarate Doctor's Best · US NIH DSLD |
855 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine Douglas Laboratories · US NIH DSLD |
500 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine 1000 mg Allergy Research Group · US NIH DSLD |
2,000 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine 250 As L-Carnitine Tartrate Jarrow Formulas · US NIH DSLD |
500 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine 250 mg Jarrow Formulas · US NIH DSLD |
500 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine 500 As L-Carnitine Tartrate Jarrow Formulas · US NIH DSLD |
1,000 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine 500 mg Jarrow Formulas · US NIH DSLD |
1,000 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine 500 mg Natrol · US NIH DSLD |
500 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine 500 mg Solgar · US NIH DSLD |
2,000 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine Fumarate Pure Encapsulations · US NIH DSLD |
1,360 mg | 94.4 | Breakdown
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| 5 tie |
L-Carnitine Fumarate 855 mg Doctor's Best · US NIH DSLD |
855 mg | 94.4 | Breakdown
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| 16 tie |
Acetyl L-Carnitine Designs for Health · Health Canada LNHPD |
800 mg | 93.3 | Breakdown
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| 16 tie |
Carnipure L-Carnitine The Vitamin Shoppe · Health Canada LNHPD |
500 mg | 93.3 | Breakdown
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| 16 tie |
GNC L-CARNITINE 1000MG Tablet GNC · Malaysia NPRA |
1,493 mg | 93.3 | Breakdown
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| 16 tie |
GNC L-CARNITINE 500 GNC · Malaysia NPRA |
733 mg | 93.3 | Breakdown
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| 20 tie |
Carnityl Thorne Research · US NIH DSLD |
1,500 mg | 92.2 | Breakdown
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| 20 tie |
L-Carnitine Thorne Research · US NIH DSLD |
990 mg | 92.2 | Breakdown
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| 20 tie |
L-Carnitine 500 mg Bluebonnet · US NIH DSLD |
500 mg | 92.2 | Breakdown
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| 23 | Best Acetyl-L-Carnitine HCl Doctor's Best, Inc. · Health Canada LNHPD |
500 mg | 87.8 | Breakdown
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| 24 tie |
Acetyl-L-Carnitine Seeking Health · US NIH DSLD |
500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine RSP · US NIH DSLD |
1,500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine Thorne FX · US NIH DSLD |
990 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine NOW · US NIH DSLD |
1,905 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine OL Olympian Labs · US NIH DSLD |
1,000 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine Cardiovascular Research · US NIH DSLD |
500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine EXOS Performance Nutrition · US NIH DSLD |
990 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine MDLogic Sport · US NIH DSLD |
500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine 1,000 mg H-E-B · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine 1000 mg BIOVEA · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine 1000 mg NutriCology · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine 2 grams GNC Beyond Raw Chemistry Labs · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine 250 mg Klaire Labs · US NIH DSLD |
1,500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine 250 mg NOW · US NIH DSLD |
1,500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine 500 mg Village Vitality · US NIH DSLD |
500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine 500 mg VitaCeutical Labs · US NIH DSLD |
500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine 500 mg Physician's Preference · US NIH DSLD |
1,500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine Power SAN · US NIH DSLD |
1,500 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine Power New You Vitamins · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
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| 24 tie |
L-Carnitine Super Size OL Olympian Labs · US NIH DSLD |
1,000 mg | 83.3 | Breakdown
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| 24 tie |
Liposomal L-Carnitine+ Codeage · US NIH DSLD |
500 mg | 83.3 | Breakdown
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| 24 tie |
Mega Strength L-Carnitine 1,000 mg Nature's Truth · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
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| 24 tie |
Super Strength Acetyl L-Carnitine HCl 1,000 mg Nature's Truth · US NIH DSLD |
2,000 mg | 83.3 | Breakdown
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| 47 tie |
Acetyl-L-Carnitine 500 mg Amy Myers MD · US NIH DSLD |
1,500 mg | 81.1 | Breakdown
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| 47 tie |
Free Form Amino Acid L-Carnitine 300 mg Nature's Plus · US NIH DSLD |
300 mg | 81.1 | Breakdown
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| 47 tie |
L-Carnitine GNC Women's Ultra Mega · US NIH DSLD |
500 mg | 81.1 | Breakdown
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| 47 tie |
L-Carnitine GNC Women's · US NIH DSLD |
500 mg | 81.1 | Breakdown
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83 products were scored; the top 50 are listed here. See the rest in the product list.
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.