Last update
3/28/2026
Reviewed By
Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 15 Researches
8.2
USERS' SCORE
Good
Based on 6 Reviews
8.2
Supplement Facts
Serving Size: 1 Veg Capsule
Amount Per Serving
%DV
L-Carnitine (Carnipure) (from L-Carnitine Tartrate)
500 mg
*
Top Medical Research Studies
9
We examined the effects of L-carnitine versus a placebo in patients who experienced acute heart attacks. Through a comprehensive review of 13 controlled trials involving over 3,600 participants, we found that L-carnitine led to notable benefits.
Specifically, it was linked to a 27% drop in overall death rates, a striking 65% reduction in life-threatening irregular heartbeats, and a 40% decrease in chest pain episodes.
However, it did not show significant improvements in heart failure or reinfarction rates. Our findings suggest that further large-scale studies should explore this promising, cost-effective treatment.
Specifically, it was linked to a 27% drop in overall death rates, a striking 65% reduction in life-threatening irregular heartbeats, and a 40% decrease in chest pain episodes.
However, it did not show significant improvements in heart failure or reinfarction rates. Our findings suggest that further large-scale studies should explore this promising, cost-effective treatment.
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9
We examined how L-carnitine (LC) protects the heart during heart attack situations. In our study involving mice, different groups received varying treatments, including LC before experiencing ischemia and reperfusion.
The findings revealed that LC significantly improved heart function after ischemia. Notably, its protective effects diminished when a specific pathway was blocked, indicating that LC's benefits are closely linked to the PI3K/Akt signaling pathway.
Additionally, LC enhanced heart cell performance even under low-oxygen conditions, supporting its potential as a heart protective agent during critical events.
The findings revealed that LC significantly improved heart function after ischemia. Notably, its protective effects diminished when a specific pathway was blocked, indicating that LC's benefits are closely linked to the PI3K/Akt signaling pathway.
Additionally, LC enhanced heart cell performance even under low-oxygen conditions, supporting its potential as a heart protective agent during critical events.
Read More
8
We examined the potential benefits of L-carnitine (LC) in helping mice recover from myocardial infarction (MI). Following a two-week treatment post-MI, LC was found to improve cardiac function and heart structure.
Our results showed reductions in harmful biomarkers and inflammatory signals in the mice treated with LC. Additionally, LC appeared to inhibit key proteins involved in cell death that could contribute to better heart recovery.
Overall, L-carnitine offers promising cardioprotective effects, especially regarding heart remodeling after a heart attack.
Our results showed reductions in harmful biomarkers and inflammatory signals in the mice treated with LC. Additionally, LC appeared to inhibit key proteins involved in cell death that could contribute to better heart recovery.
Overall, L-carnitine offers promising cardioprotective effects, especially regarding heart remodeling after a heart attack.
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Most Useful Reviews
9
Notable effects
3 people found this helpful
I trust this manufacturer, and once again they have met my expectations. I got this for my wife to support her heart muscle post-operation. The positive effects were noticeable immediately after starting the intake.
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9
Significant improvement
1 people found this helpful
My mother has heart failure. Alongside her drug treatment, she takes supplements to enhance her heart's energy. CoQ10 and L-Carnitine are particularly beneficial; the latter aids in fat metabolism as well as heart health. After taking these, my mother feels significantly better and her communication has improved. There is a noticeable boost in her strength.
Read More
7.5
Improves wellbeing
5 people found this helpful
Carnitine is fantastic for thyroid and heart health. We take L-Carnitine and it noticeably boosts our condition. My daughter's sleep has improved, leading to less discomfort since starting L-Carnitine. When she stops taking it, the difference in her wellbeing is obvious.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 15 Researches
8.2
- All Researches
9.5
In our controlled study involving 16 male rats, we explored the effects of intravenous (IV) L-carnitine on survival rates and heart function during severe verapamil toxicity.
We found that L-carnitine notably increased survival time, averaging about 140 minutes compared to just 49 minutes for the saline group.
Additionally, at 15 minutes, those treated with L-carnitine had significantly better blood pressure readings. This indicates that L-carnitine may help support heart function during critical toxicity events.
We found that L-carnitine notably increased survival time, averaging about 140 minutes compared to just 49 minutes for the saline group.
Additionally, at 15 minutes, those treated with L-carnitine had significantly better blood pressure readings. This indicates that L-carnitine may help support heart function during critical toxicity events.
Read More
9
We examined how L-carnitine (LC) protects the heart during heart attack situations. In our study involving mice, different groups received varying treatments, including LC before experiencing ischemia and reperfusion.
The findings revealed that LC significantly improved heart function after ischemia. Notably, its protective effects diminished when a specific pathway was blocked, indicating that LC's benefits are closely linked to the PI3K/Akt signaling pathway.
Additionally, LC enhanced heart cell performance even under low-oxygen conditions, supporting its potential as a heart protective agent during critical events.
The findings revealed that LC significantly improved heart function after ischemia. Notably, its protective effects diminished when a specific pathway was blocked, indicating that LC's benefits are closely linked to the PI3K/Akt signaling pathway.
Additionally, LC enhanced heart cell performance even under low-oxygen conditions, supporting its potential as a heart protective agent during critical events.
Read More
9
We aimed to find out if carnitine, when paired with vitamin E, could protect rats from heart attacks induced by isoproterenol. Our study involved different groups of rats, some receiving only carnitine or vitamin E, while others received both. The results were promising, as those treated with both supplements showed significant improvements in heart function and reductions in harmful enzymes and inflammatory markers. However, we did not observe the same positive effects from carnitine alone.
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9
Methyl-GBB provides lasting heart protection
We examined how methyl-GBB, a carnitine transport inhibitor, impacts heart health following a treatment period. In our study with male Wistar rats, we found that after 28 days of methyl-GBB treatment, long-chain acylcarnitines (LCACs) in the heart dropped by 87%, which led to a significant reduction in heart tissue damage, or infarct size, by 57%. Remarkably, even two weeks after stopping the treatment, both the LCAC levels and damage remained lower. This research suggests a strong link between diminishing LCACs and lasting heart protection.
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9
L-carnitine reduction protects heart tissue
We explored whether reducing L-carnitine levels can safeguard the heart from damage during a heart attack. In our study, we tested a compound called Methyl-GBB that successfully lowered both L-carnitine and its associated fatty acids in heart tissue.
By inhibiting fatty acid oxidation, Methyl-GBB not only decreased the damage from heart attacks but also improved survival rates in rats. While we found promising results, it's essential to note that this study is preliminary, and the direct implications for human treatment remain uncertain.
By inhibiting fatty acid oxidation, Methyl-GBB not only decreased the damage from heart attacks but also improved survival rates in rats. While we found promising results, it's essential to note that this study is preliminary, and the direct implications for human treatment remain uncertain.
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User Reviews
USERS' SCORE
Good
Based on 6 Reviews
8.2
- All Reviews
- Positive Reviews
- Negative Reviews
9
Notable effects
3 people found this helpful
I trust this manufacturer, and once again they have met my expectations. I got this for my wife to support her heart muscle post-operation. The positive effects were noticeable immediately after starting the intake.
Read More
9
Significant improvement
1 people found this helpful
My mother has heart failure. Alongside her drug treatment, she takes supplements to enhance her heart's energy. CoQ10 and L-Carnitine are particularly beneficial; the latter aids in fat metabolism as well as heart health. After taking these, my mother feels significantly better and her communication has improved. There is a noticeable boost in her strength.
Read More
7.5
Improves wellbeing
5 people found this helpful
Carnitine is fantastic for thyroid and heart health. We take L-Carnitine and it noticeably boosts our condition. My daughter's sleep has improved, leading to less discomfort since starting L-Carnitine. When she stops taking it, the difference in her wellbeing is obvious.
Read More
9
Highly recommended
2 people found this helpful
Heart Smart L-Carnitine is excellent for heart health and was recommended to me by a naturopath. IHerb consistently provides great products.
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7.5
Energy boost
1 people found this helpful
Great! I took this myself as I lacked energy after Covid. I take one capsule in the morning on an empty stomach, and after about 30-40 minutes, I feel an influx of energy. It also helps me during yoga and Pilates, and I enjoy it. My heart feels grateful for this supplement, and I also give it to my teenage daughter for metabolism and thyroid support as per her endocrinologist's advice.
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Frequently Asked Questions
No FAQs are available for this product and symptom.
References
- Guerreiro G, Deon M, Becker GS, Dos Reis BG, Wajner M, et al. Neuroprotective effects of L-carnitine towards oxidative stress and inflammatory processes: a review of its importance as a therapeutic drug in some disorders. Metab Brain Dis. 2025;40:127. 10.1007/s11011-025-01545-6
- Li HR, Zheng XM, Liu Y, Tian JH, Kou JJ, et al. L-Carnitine Alleviates the Myocardial Infarction and Left Ventricular Remodeling through Bax/Bcl-2 Signal Pathway. Cardiovasc Ther. 2022;2022:9615674. 10.1155/2022/9615674
- Shved MI, Yastremska IO, Martynyuk LP, Yastremska SO, Dobrianskyi TO. Management of central hemodynamic and endothelial function disturbances in patients with myocardial infarction combined with metabolic syndrome. Pol Merkur Lekarski. 2021;49:325. PubMed
- Emran T, Chowdhury NI, Sarker M, Bepari AK, Hossain M, et al. L-carnitine protects cardiac damage by reducing oxidative stress and inflammatory response via inhibition of tumor necrosis factor-alpha and interleukin-1beta against isoproterenol-induced myocardial infarction. Biomed Pharmacother. 2021;143:112139. 10.1016/j.biopha.2021.112139
- Xue M, Chen X, Guo Z, Liu X, Bi Y, et al. L-Carnitine Attenuates Cardiac Dysfunction by Ischemic Insults Through Akt Signaling Pathway. Toxicol Sci. 2017;160:341. 10.1093/toxsci/kfx193
- Huwait EA, Al-Ghamdi MA. PROTECTIVE ROLE OF CARNITINE SYNERGIZED WITH VITAMIN E AGAINST ISOPROTERENOL INDUCED CARDIAC INFARCTION IN RATS. Afr J Tradit Complement Altern Med. 2017;14:25. 10.21010/ajtcam.v14i2.4
- Kuka J, Makrecka-Kuka M, Cirule H, Grinberga S, Sevostjanovs E, et al. Decrease in Long-Chain Acylcarnitine Tissue Content Determines the Duration of and Correlates with the Cardioprotective Effect of Methyl-GBB. Basic Clin Pharmacol Toxicol. 2017;121:106. 10.1111/bcpt.12775
- Liepinsh E, Makrecka-Kuka M, Kuka J, Vilskersts R, Makarova E, et al. Inhibition of L-carnitine biosynthesis and transport by methyl-γ-butyrobetaine decreases fatty acid oxidation and protects against myocardial infarction. Br J Pharmacol. 2015;172:1319. 10.1111/bph.13004
- Liepinsh E, Makrecka M, Kuka J, Cirule H, Makarova E, et al. Selective inhibition of OCTN2 is more effective than inhibition of gamma-butyrobetaine dioxygenase to decrease the availability of l-carnitine and to reduce myocardial infarct size. Pharmacol Res. 2014;85:33. 10.1016/j.phrs.2014.05.002
- Dinicolantonio JJ, Niazi AK, McCarty MF, Lavie CJ, Liberopoulos E, et al. L-carnitine for the treatment of acute myocardial infarction. Rev Cardiovasc Med. 2014;15:52. 10.3909/ricm0710
- DiNicolantonio JJ, Lavie CJ, Fares H, Menezes AR, O'Keefe JH. L-carnitine in the secondary prevention of cardiovascular disease: systematic review and meta-analysis. Mayo Clin Proc. 2013;88:544. 10.1016/j.mayocp.2013.02.007
- Liepinsh E, Skapare E, Kuka J, Makrecka M, Cirule H, et al. Activated peroxisomal fatty acid metabolism improves cardiac recovery in ischemia-reperfusion. Naunyn Schmiedebergs Arch Pharmacol. 2013;386:541. 10.1007/s00210-013-0849-0
- Lou PH, Zhang L, Lucchinetti E, Heck M, Affolter A, et al. Infarct-remodelled hearts with limited oxidative capacity boost fatty acid oxidation after conditioning against ischaemia/reperfusion injury. Cardiovasc Res. 2013;97:251. 10.1093/cvr/cvs323
- Perez E, Chu J, Bania T, Medlej K. L-carnitine increases survival in a murine model of severe verapamil toxicity. Acad Emerg Med. 2011;18:1135. 10.1111/j.1553-2712.2011.01217.x
- Gaby AR. Nutritional treatments for acute myocardial infarction. Altern Med Rev. 2010;15:113. PubMed
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