L-Arginine vs L-Carnitine for performance
Short answer: For performance, more users report improvement with L-Carnitine — 92% of 13 reports, versus 83% of 12 for L-Arginine.
L-Arginine has 106 meta-analyses and 765 randomized trials on PubMed; L-Carnitine has 170 and 466.
Based on 211 reports about L-Arginine and 195 about L-Carnitine. Not medical advice.
| L-Arginine Supplement | L-Carnitine Supplement | |
|---|---|---|
| Users say it helped | 49%helped78 reports · medium confidence | 61%helped55 reports · medium confidence |
| Verdict | Mixed | Mostly positive |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 106 / 765 | 170 / 466 |
| Mainly used for | ||
| Libido % reporting improvement | 88% (41) | — |
| Performance % reporting improvement | 83% (12) | 92% (13) |
| Energy % reporting improvement | — | 96% (23) |
| Weight loss % reporting improvement | 0% (2) | 67% (18) |
| Heart & lipids % reporting improvement | 86% (14) | 0% (2) |
| Common side effects | diarrhea, stomach issues, chest pain, tongue biting | injection pain, insomnia, tingling, lowered thyroid |
| Typical dose reported | 2 g / before bed | 2 g / daily |
Supplementation of some but not all micronutrients may benefit cardiometabolic health. This study highlights the importance of micronutrient diversity and the balance of benefits and risks to promote and maintain cardiovascular health in diverse populations. (Antioxidant Supplementation in the Prevention and Treatment of Cardiovascular Diseases; CRD42022315165).
J Am Coll Cardiol, 2022 ↗“Something I found that makes my meds work way better is Citrulline 2g + Arginine 2g twice daily.”
l-carnitine supplementation provides a modest reducing effect on body weight, BMI and fat mass, especially among adults with overweight/obesity.
Clin Nutr ESPEN, 2020 ↗“amino acids L carnitine and glutamine made a difference in my skin.”
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Percentages come from first-hand user reports and are not clinical outcomes. Talk to a doctor before starting, stopping or combining anything. How we rate