View abstract. 2006;132(2):121-128. Wang, S. B., Weng, W. C., Lee, N. C., Hwu, W. L., Fan, P. C., and Lee, W. T. Mutation of mitochondrial DNA G13513A presenting with Leigh syndrome, Wolff-Parkinson-White syndrome and cardiomyopathy. Bruno A, Pandolfo G, Crucitti M, Lorusso S, Zoccali RA, Muscatello MR. Acetyl-L-Carnitine Augmentation of Clozapine in Partial-Responder Schizophrenia: A 12-Week, Open-Label Uncontrolled Preliminary Study. Med.Sci Monit. J Drug Dev 1988;1(3):163-166. Does L carnitine coffee make you lose weight? Noble S, Goa KL. View abstract. Khajeh B, Dashti-Khavidaki S, Nasiri-Toosi M, Mohammadi K, Jafari A. View abstract. View abstract. L-Carnitine Supplement Side Effects. Calo, L. A., Pagnin, E., Davis, P. A., Semplicini, A., Nicolai, R., Calvani, M., and Pessina, A. C. Antioxidant effect of L-carnitine and its short chain esters: relevance for the protection from oxidative stress related cardiovascular damage. Levocarnitine administration in multiple sclerosis patients with immunosuppressive therapy-induced fatigue. Guevara-Campos, J., Gonzalez-Guevara, L., Parada, Y., and Urbaez-Cano, J. 1989;4(5):366-371. Clin Ter. More research is needed on long-term benefits for healthy individuals. The brain, inflammation and you Inflammation intimately affects sleep quality, especially in older adults. 7-14-2009;89(26):1858-1861. 2008;21(11):1231-1237. View abstract. CNS.Drugs 2007;21 Suppl 1:25-30. J Clin Endocrinol Metab 2001;86:3579-94. A., Carroll, V. S., Klawans, H. L., and Fariello, R. G. L-acetyl-carnitine in Huntington's disease: double-blind placebo controlled crossover study of drug effects on movement disorder and dementia. Harper, P., Elwin, C. E., and Cederblad, G. Pharmacokinetics of intravenous and oral bolus doses of L-carnitine in healthy subjects. Jirillo, E., Altamura, M., Munno, I., Pellegrino, N. M., Sabato, R., Di Fabio, S., and De Simone, C. Effects of acetyl-L-carnitine oral administration on lymphocyte antibacterial activity and TNF-alpha levels in patients with active pulmonary tuberculosis. View abstract. BJU.Int. 2010;68(5):743-752. Cheng, H. J. and Chen, T. [Clinical efficacy of combined L-carnitine and acetyl-L-carnitine on idiopathic asthenospermia]. Carnitine, valproate, and toxicity. View abstract. View abstract. Pediatr.Hematol.Oncol. View abstract. Postgrad Med J 1996;72:45-50. Creatine supplements may help improve strength and muscle mass in women. View abstract. View abstract. View abstract. Is there a good explanation for this? Alternative medical interventions used in the treatment and management of myalgic encephalomyelitis/chronic fatigue syndrome and fibromyalgia. This article examines the potential risks and benefits of L-carnitine supplements and explains how this nutrient functions in your body. Guan, Y., Zheng, X. M., Yang, Z. W., and Li, S. W. [Protective effects of L-carnitine upon testicular ischemia-reperfusion damage in rats]. 2010;106(4):296-301. Rizzon, P., Biasco, G., Di Biase, M., Boscia, F., Rizzo, U., Minafra, F., Bortone, A., Siliprandi, N., Procopio, A., Bagiella, E., and . . . Eur J Appl Physiol Occup Physiol 1996;73:434-9. It specifically emphasizes upon the beneficial role of l-carnitine in cardiomyopathy. Di Cesare Mannelli L, Ghelardini C, Calvani M, et al. 2007;62(4):349-354. View abstract. L-carnitine: Uses, Side Effects, Dose, Health - eMedicineHealth Nourshahi, M., Kaviani, M., Kimiagar, M., and Ebrahim, K. H. The effects of acute L-carnitine supplementation on anaerobic threshold and lactate accumulation during an incremental exercise. Am J Cardiol. View abstract. Malaguarnera, M., Gargante, M. P., Cristaldi, E., Colonna, V., Messano, M., Koverech, A., Neri, S., Vacante, M., Cammalleri, L., and Motta, M. Acetyl L-carnitine (ALC) treatment in elderly patients with fatigue. Tempesta E, Troncon R, Janiri L, et al. B., Lagler, F., Maier, E. M., Schwahn, B., Tokatli, A., Dursun, A., Coskun, T., Chalmers, R. A., Koeller, D. M., Zschocke, J., Christensen, E., Burgard, P., and Hoffmann, G. F. Natural history, outcome, and treatment efficacy in children and adults with glutaryl-CoA dehydrogenase deficiency. People taking carnitine have reported a number of side effects, including: Diarrhea, nausea, stomach pain, and vomiting Headaches Trouble sleeping Higher blood pressure Lower blood sugar and. Swart I, Rossouw J, Loots JM, and et al. Torrioli, M. G., Vernacotola, S., Mariotti, P., Bianchi, E., Calvani, M., De Gaetano, A., Chiurazzi, P., and Neri, G. Double-blind, placebo-controlled study of L-acetylcarnitine for the treatment of hyperactive behavior in fragile X syndrome. View abstract. (20,39) Since L-carnitine has a central role in fat metabolism and has significant antioxidant properties as well, carnitine supplementation has been investigated as a treatment option in the management of type 2 diabetes. Nefrologia. Biomed Pharmacother. Am J Nephrol 1990;10(2):109-114. Sano M, Bell K, Cote L, et al. The Effects of L-Carnitine, Acetyl-L-Carnitine, and Propionyl-L-Carnitine on Body Mass in Type 2 Diabetes Mellitus Patients. View abstract. El Sharkwy I, Sharaf El-Din M. l-Carnitine plus metformin in clomiphene-resistant obese PCOS women, reproductive and metabolic effects: a randomized clinical trial. Kidney Int 38 (1990): 904-11, 4. Int J Clin Pharmacol Res 1992;12:299-304. Comparison of the effects of L-carnitine and acetyl-L-carnitine on carnitine levels, ambulatory activity, and oxidative stress biomarkers in the brain of old rats. Nephrol Dial Transplant 1996;11:A262. View abstract. l-Carnitine and heart disease - PubMed Additionally, the risk of deficiency is higher for those with diseases like cirrhosis and kidney disease. A placebo-controlled double-blind randomized trial of the use of combined l-carnitine and l-acetyl-carnitine treatment in men with asthenozoospermia. However, L-carnitine supplements may raise your blood levels of trimethylamine-N-oxide (TMAO) over time. J Pharm Sci 1995;84(5):627-633. In studies in mice, TMAO has been shown to cause atherosclerosis, the disease process that leads . Effect of L-carnitine treatment in vivo on apoptosis and ceramide generation in peripheral blood lymphocytes from AIDS patients. View abstract. J Neuropsychiatry Clin Neurosci. Because carnosine can lower blood pressure, individuals with already low blood pressure should exercise extra caution when taking it . [Efficacy of natural vitamin E on oligospermia and asthenospermia: a prospective multi-centered randomized controlled study of 106 cases]. View abstract. Acetyl-L-Carnitine Benefits for the Mind and Body - Nootropic.org 1999;2(2):65-73. J Am Coll Nutr. Effect of PLC on functional parameters and oxidative profile in type 2 diabetes-associated PAD. Soczynska, J. K., Kennedy, S. H., Chow, C. S., Woldeyohannes, H. O., Konarski, J. Naito J, Ohashi H, Ohno M, et al. Does oral L-carnitine alter plasma triglyceride levels in hypertriglyceridaemic subjects with or without non-insulin dependent diabetes mellitus? Protective role of carnitine in breast cancer via decreasing arginase activity and increasing nitric oxide. Randomized controlled trial of N-acetylcysteine versus l-carnitine among women with clomiphene-citrate-resistant polycystic ovary syndrome. View abstract. J Inherit.Metab Dis 2006;29(2-3):288-298. Zhang, J. M., Gu, X. F., Shao, X. H., Song, X. Q., Han, L. S., Ye, J., Qiu, W. J., Gao, X. L., Wang, Y., and Wang, M. X. Miyagawa T, Kawamura H, Obuchi M, Ikesaki A, Ozaki A, Tokunaga K, Inoue Y, Honda M. Effects of oral L-carnitine administration in narcolepsy patients: a randomized, double-blind, cross-over and placebo-controlled trial. View abstract. View abstract. Chen Y, Abbate M, Tang L, Cai G, Gong Z, Wei R, Zhou J, Chen X. L-Carnitine supplementation for adults with end-stage kidney disease requiring maintenance hemodialysis: a systematic review and meta-analysis. Bohles H, Sewell AC, Wenzel D. The effect of carnitine supplementation in valproate-induced hyperammonaemia. View abstract. View abstract. It can cause side effects such as stomach upset, heartburn, diarrhea, and seizures. Carnitine is a micronutrient derived from amino acids and is found in almost all the cells of your body. Arch.Pharm Res 2012;35(11):1945-1952. Drugs.com provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. Tarighat, Esfanjani A., Mahdavi, R., Ebrahimi, Mameghani M., Talebi, M., Nikniaz, Z., and Safaiyan, A. 2013 Sep;67(7):659-63. The effect of L-carnitine (carnitene) on myocardial metabolism of patients with coronary artery disease. I tried this recently at a low dose, 125 mg, and had strong side effects for a day or two. Spiekerkoetter, U., Lindner, M., Santer, R., Grotzke, M., Baumgartner, M. R., Boehles, H., Das, A., Haase, C., Hennermann, J. J Inherit.Metab Dis 2007;30(5):811. Effect of glycine propionyl-L-carnitine on aerobic and anaerobic exercise performance. View abstract. Interaction with zidovudine. Postiglione A, Soricelli A, Cicerano U, et al. Shakeri, A., Tabibi, H., and Hedayati, M. Effects of L-carnitine supplement on serum inflammatory cytokines, C-reactive protein, lipoprotein (a), and oxidative stress in hemodialysis patients with Lp (a) hyperlipoproteinemia. Bartels GL, Remme WJ, Holwerda KJ, Kruijssen DA. Sirtori, C. R., Calabresi, L., Ferrara, S., Pazzucconi, F., Bondioli, A., Baldassarre, D., Birreci, A., and Koverech, A. L-carnitine reduces plasma lipoprotein(a) levels in patients with hyper Lp(a). J Child Neurol 1995;10:S40-4. insomnia numbness in feet or hands Call your doctor if any of these symptoms persist, or if they get worse. View abstract. Comparison of pharmacokinetics of L-carnitine, acetyl-L-carnitine and propionyl-L-carnitine after single oral administration of L-carnitine in healthy volunteers. Lee, N. C., Tang, N. L., Chien, Y. H., Chen, C. A., Lin, S. J., Chiu, P. C., Huang, A. C., and Hwu, W. L. Diagnoses of newborns and mothers with carnitine uptake defects through newborn screening. Immunopharmacol.Immunotoxicol. Drugs Exp Clin Res 1999;25:29-36. View abstract. "Product Information. It can also cause the urine, breath, and sweat to have a "fishy" odor. Shahidi M, Hashemi SR, Fattahi N, et al. Wadman, R. I., Bosboom, W. M., van der Pol, W. L., van den Berg, L. H., Wokke, J. H., Iannaccone, S. T., and Vrancken, A. F. Drug treatment for spinal muscular atrophy types II and III. Rockstar zero carb packs a powerful boost but has zero sugar and just 10 carbs per serving. Lacour, B., Di Giulio, S., Chanard, J., Ciancioni, C., Haguet, M., Lebkiri, B., Basile, C., Drueke, T., Assan, R., and Funck-Brentano, J. L. Carnitine improves lipid anomalies in haemodialysis patients. View abstract. It can also cause the. Plasma carnitine deficiency: Clinical observations in 51 pediatric patients. L-Carnitine may cause serious side effects. Penn, D., Schmidt-Sommerfeld, E., and Pascu, F. Decreased tissue carnitine concentrations in newborn infants receiving total parenteral nutrition. View abstract. View abstract. Georgala S, Schulpis KH, Georgala C, Michas T. L-carnitine supplementation in patients with cystic acne on isotretinoin therapy. View abstract. Genazzani, A. D., Lanzoni, C., Ricchieri, F., Santagni, S., Rattighieri, E., Chierchia, E., Monteleone, P., and Jasonni, V. M. Acetyl-L-carnitine (ALC) administration positively affects reproductive axis in hypogonadotropic women with functional hypothalamic amenorrhea. 2003;21(3):271-275. Available at: https://www.fda.gov/orphan/designat/alldes.rtf. View abstract. Dietary supplements for erectile dysfunction: A natural treatment for Plioplys AV, Kasnicka I. L-carnitine as a treatment for Rett syndrome. View abstract. Helms, R. A., Mauer, E. C., Hay, W. W., Jr., Christensen, M. L., and Storm, M. C. Effect of intravenous L-carnitine on growth parameters and fat metabolism during parenteral nutrition in neonates. View abstract. View abstract. View abstract. Plioplys AV, Plioplys S. Amantadine and L-carnitine treatment of Chronic Fatigue Syndrome. View abstract. In a preliminary analysis, we reported that L-carnitine could improve fatigue, mood and sleep. Rossle, C., Pichard, C., Roulet, M., Chiolero, R., Schutz, Y., Temler, E., Schindler, C., Zurlo, F., Jequier, E., and Furst, P. [Effect of L-carnitine supplemented total parenteral nutrition on postoperative lipid and nitrogen utilization]. Rajasekar, P., Palanisamy, N., and Anuradha, C. V. Increase in nitric oxide and reductions in blood pressure, protein kinase C beta II and oxidative stress by L-carnitine: a study in the fructose-fed hypertensive rat. By Steve Blechman BREAKING NEWS! Benefits of L-carnitine. Cochrane.Database.Syst.Rev. The use of CAM by women suffering from nausea and vomiting during pregnancy. However, this does not explain why insomnia actually occurs. De Simone, C., Tzantzoglou, S., Famularo, G., Moretti, S., Paoletti, F., Vullo, V., and Delia, S. High dose L-carnitine improves immunologic and metabolic parameters in AIDS patients. 2013 Jun;19(2):165-72. View abstract. Applies to levocarnitine: capsule, capsule liquid filled, solution, tablet. Persico G, Amato B, Aprea G, et al. A., Burlina, A. Changes in lipid pattern. A. Nasser, M., Javaheri, H., Fedorowicz, Z., and Noorani, Z. Carnitine supplementation for inborn errors of metabolism. See our dietitian's picks for women. Clin Mol Hepatol. Talenezhad N, Mohammadi M, Ramezani-Jolfaie N, Mozaffari-Khosravi H, Salehi-Abargouei A. J Urol. Guideri, F., Acampa, M., Hayek, Y., and Zappella, M. Effects of acetyl-L-carnitine on cardiac dysautonomia in Rett syndrome: prevention of sudden death? View abstract. 2009;6:9. Russell, S. Carnitine as an antidote for acute valproate toxicity in children. Obstet.Gynecol. Interventions for treating leg ulcers in people with sickle cell disease. Schweiz.Med Wochenschr 9-12-1992;122(37):1352-1355. View abstract. Carnosine supplements are available as powders and capsules. Novak M, Monkus EF, Buch M, and et al. View abstract. View abstract. Cochrane.Database.Syst.Rev. Smart Grocery Shopping When You Have Diabetes, Surprising Things You Didn't Know About Dogs and Cats, Multi-Country Hepatitis Outbreak in Children, Needle-Free Epinephrine Options Are On The Horizon, Longer Vaccine Interval May Boost Antibodies 9 Times, How Walmart Is Rethinking Health (Medscape video), Dr. Whyte's Book: Take Control of Your Diabetes Risk. J Am Med Assoc 1999;282:2305-12. View abstract. Will We Ever See an End to Alzheimers? 2006;7(2):101-109. View abstract. View abstract. View abstract. View abstract. Nagai, N., Kameda, N., Kobashi, R., Nishida, M., Horikawa, C., Egawa, K., Yoshimura, M., Kitagawa, Y., Abe, K., Kiso, Y., Sakane, N., Kotani, K., and Moritani, T. Effect of L-carnitine intake upon reduction of hunger feeling in young healthy females. Bonner CM, DeBrie KL, Hug G, et al. Wang, Y. X., Yang, S. W., Qu, C. B., Huo, H. X., Li, W., Li, J. D., Chang, X. L., and Cai, G. Z. 2005;25(7):470-477. Hyperammonemia and carnitine deficiency in a patient receiving sulfadiazine and pyrimethamine. View abstract. [Effect of L-carnitine in patients with ischemic heart disease]. J Inherit.Metab Dis 2008;31 Suppl 2:S453-S456. Gurlek, A., Tutar, E., Akcil, E., Dincer, I., Erol, C., Kocaturk, P. A., and Oral, D. The effects of L-carnitine treatment on left ventricular function and erythrocyte superoxide dismutase activity in patients with ischemic cardiomyopathy. Effects of L-carnitine supplementation on lipid profiles in patients with coronary artery disease. Carnitine supplementation in diphtheria. Drugs Aging 2003;20:761-7. View abstract. 2020;37:9-23. Cucinotta D, Passeri M, Ventura S, and et al. View abstract. View abstract. Clin Exp.Rheumatol. View abstract. Kidney Blood Press Res. It is made by your body and also available as a supplement. Neurology 1991;41:1726-32. View abstract. You should not breast-feed while using L-Carnitine. [Reduction of hospitalization thanks to L-carnitine in hemodialyzed patients]. (Tokyo) 2001;47(6):378-384. Research suggests that L-carnitine may aid exercise performance and treat health conditions like heart disease and type 2 diabetes. 2014 Jun;63(6):996-1004. View abstract. Pregnancy-related changes of carnitine and acylcarnitine concentrations of plasma and erythrocytes. View abstract. 2004;97(2):c41-c48. View abstract. Cherchi A, Lai C, Angelino F, et al. Effects of l-carnitine supplementation on weight loss and body composition: A systematic review and meta-analysis of 37 randomized controlled clinical trials with dose-response analysis. View abstract. Expert.Opin.Investig.Drugs 2008;17(6):827-843. View abstract. The effect of carnitine in patients using artificial pacemakers. 2008;107(2):139-144. Eur.Urol. 2014 Feb;99(2):408-22. 2009;32(1):35-40. Propionyl-L-carnitine is likely to be safe when used under medical supervision. Sawicka AK, Hartmane D, Lipinska P, Wojtowicz E, Lysiak-Szydlowska W, Olek RA. 2009;61(4):215-217. Phase IIb multicentred randomised trial of besifovir (LB80380) versus entecavir in Asian patients with chronic hepatitis B. J Pharmacol Exp Ther 1999;290:1482-92. Campos Y, Arenas J. Propionyl-L-carnitine: Studies have shown that propionyl-L-carnitine combined with Viagra might improve erectile function better than sildenafil alone. Baghban F, Hosseinzadeh M, Mozaffari-Khosravi H, Dehghan A, Fallahzadeh H. The effect of L-Carnitine supplementation on clinical symptoms, C-reactive protein and malondialdehyde in obese women with knee osteoarthritis: a double blind randomized controlled trial. Int J Clin Pharmacol Ther. Carnitine is also synthesized endogenously in the liver . 1983;38(4):523-531. Malaguarnera, M., Vacante, M., Giordano, M., Motta, M., Bertino, G., Pennisi, M., Neri, S., Malaguarnera, M., Li, Volti G., and Galvano, F. L-carnitine supplementation improves hematological pattern in patients affected by HCV treated with Peg interferon-alpha 2b plus ribavirin. [L-carnitine: safe and effective for asthenozoospermia]. View abstract. Drugs Exp Clin Res 1994;20:169-76. View abstract. View abstract. Liammongkolkul, S., Kuptanon, C., Wasant, P., Vatanavicharn, N., Sawangareetrakul, P., Keeratichamroen, S., Cairns, J. R. K., Srisomsap, C., and Svasti, J. Curr Ther Res 1980;27(2):208-216. View abstract. On carnitine content of the human breast milk. Acetyl-L-carnitine as a therapeutic agent for mental deterioration in geriatric patients (Double-blind placebo controlled study). View abstract. J Huazhong.Univ Sci Technolog.Med.Sci 2006;26(2):188-191. J Cardiovasc Thorac Res 2020;12(4):246-255. Amino.Acids 2012;42(5):1783-1792. de Lira-Garcia, C., Souto-Gallardo, M., Bacardi-Gascon, M., and Jimenez-Cruz, A. While it may aid in weight loss for obese individuals or older adults, a thorough diet and exercise regimen must be in place first. 11 Best Foods to Boost Your Brain and Memory, The 10 Best Nootropic Supplements to Boost Brain Power, How to Speed Up Your Metabolism: 9 Easy Ways Backed by Science, 18 Popular Weight Loss Medications and Supplements Reviewed, 6 Reasons Why Eggs Are the Healthiest Food on the Planet, Fast Metabolism 101: What It Is and How to Get It. 2009;19(3):212-216. 2011;46(6):750-759. Derosa, G., Maffioli, P., Ferrari, I., D'Angelo, A., Fogari, E., Palumbo, I., Randazzo, S., and Cicero, A. F. Orlistat and L-carnitine compared to orlistat alone on insulin resistance in obese diabetic patients. Pryor, J. L., Glass, S. L., Campagnone, J., and Sigman, M. Randomized double blind placebo controlled trial of carnitine for the treatment of idiopathic asthenospermia. How can you boost your metabolism? Yano J, Kaida Y, Maeda T, et al. Tsoko M, Beauseigneur F, Gresti J, et al. View abstract. Z Geburtshilfe Perinatol. Brevetti G, Perna S, Sabba C, et al. View abstract. View abstract. Asymptomatic hyperammonemia in children treated with valproic acid. Skip the missed dose if it is almost time for your next scheduled dose. Am.J Emerg.Med. Nootropics are drugs or supplements that can boost brain function. View abstract. L-carnitine is supplemented daily. J Infect Dis 1997;176:406-13. J Nephrol. View abstract. JPEN J Parenter.Enteral Nutr. View abstract. View abstract. Am.J Med Genet. What time of day is best to take L-carnitine? [Updated!] Management and outcome in 75 individuals with long-chain fatty acid oxidation defects: results from a workshop. Clin Ter. Sarris, J., Kean, J., Schweitzer, I., and Lake, J. Complementary medicines (herbal and nutritional products) in the treatment of Attention Deficit Hyperactivity Disorder (ADHD): a systematic review of the evidence. Ye, J., Li, C. J., and Liu, J. H. [A clinical analysis of methylmalonic acidemia in adolescents]. Ovidius University Annals, Physical Education and Sport/Science, Movement and Health Series 2010;10(Suppl 2):504-507. Gastrointestinal Four weeks of taking supplements did not increase fat burning (28). Gramignano, G., Lusso, M. R., Madeddu, C., Massa, E., Serpe, R., Deiana, L., Lamonica, G., Dessi, M., Spiga, C., Astara, G., Maccio, A., and Mantovani, G. Efficacy of l-carnitine administration on fatigue, nutritional status, oxidative stress, and related quality of life in 12 advanced cancer patients undergoing anticancer therapy. Zwickler, T., Lindner, M., Aydin, H. I., Baumgartner, M. R., Bodamer, O. [A systematic review of the effectiveness of alternative weight-loss products' ingredients]. The equivalent dosage range for other forms of L-carnitine are as follows: 630-2,500mg (ALCAR), 1,000-4,000mg . View abstract. Does carnitine cause insomnia? Int.J Sport Nutr.Exerc.Metab 2008;18(1):19-36. View abstract. Chen, J. C., Tsai, T. C., Liu, C. S., and Lu, C. T. Acute hearing loss in a patient with mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes (MELAS). Fertil Steril 2004;81:1578-84. Cochrane.Database.Syst.Rev. [Infantile encephalopathy associated with the MELAS A3243G mutation. Adefovir dipivoxil. Benton, D. and Donohoe, R. T. The influence on cognition of the interactions between lecithin, carnitine and carbohydrate. Does carnitine cause insomnia? B., Abdenur, J. E., and Wing, D. A. Carnitine deficiency in pregnancy. The mitochondria act. Fundam.Clin Pharmacol 2011;25(5):642-651. Report of one case]. Moustafa, A. M. and Boshra, V. The possible role of L-carnitine on the skeletal muscle of ovariectomized rats. Fagher, B., Cederblad, G., Monti, M., Olsson, L., Rasmussen, B., and Thysell, H. Carnitine and left ventricular function in haemodialysis patients. Acta Neurol.Taiwan. L-Carnitine: Jim Stoppani Explains The Benefits of Carnitine Effect of dialysate composition on the lipid response to L-carnitine supplementation. Glycine Propionyl L-Carnitine (GPLC) is used to alleviate intermittent claudication and blood flow issues. View abstract. The effect of (L-)carnitine on weight loss in adults: a systematic review and meta-analysis of randomized controlled trials. Prohaska ES, Muzyk AJ, Rivelli SK. Am.J Cardiol. Gesuete, V., Ragni, L., and Picchio, F. M. [The "big heart" of carnitine]. 1987;1(4):238-241. Even higher doses may cause insomnia. View abstract. Angiology 1995;46(8):705-713. 1993;142(2):155-159. View abstract. View abstract. Bolognesi, M., Amodio, P., Merkel, C., Godi, L., and Gatta, A. Clin Exp.Immunol. Brunel-Guitton, C., Costa, T., Mitchell, G. A., and Lambert, M. Treatment of cobalamin C (cblC) deficiency during pregnancy. However, several studies note mild benefits associated with larger or more long-term doses (43, 44, 45). Int J Sport Nutr Exerc.Metab 2010;20(2):104-114. Carnitine in the therapy of dyslipidemic patients. L-carnitine and platelet aggregation in uremic patients subjected to hemodialysis. Am J Cardiol 1994;74:125-30. Fujiwara, M., Nakano, T., Tamoto, S., Yamada, Y., Fukai, M., Takada, K., Ashida, H., Shimada, T., Ishihara, T., and Seki, I. Loffredo, L., Marcoccia, A., Pignatelli, P., Andreozzi, P., Borgia, M. C., Cangemi, R., Chiarotti, F., and Violi, F. Oxidative-stress-mediated arterial dysfunction in patients with peripheral arterial disease. It seems l carnitine is a relatively safe nutrient in doses ranging from 50 to 500 mg. Higher doses may lead to excess energy, restlessness, perhaps insomnia. Sproule, D. M., Dyme, J., Coku, J., de, Vinck D., Rosenzweig, E., Chung, W. K., and De Vivo, D. C. Pulmonary artery hypertension in a child with MELAS due to a point mutation of the mitochondrial tRNA((Leu)) gene (m.3243A > G). Jpn Heart J 1995;36(3):319-331. Prog Retin Eye Res. 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