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GPLC And CoQ10 by Doctors Best 30 Vegetarian Capsules
Enhances Cardiovascular And Muscle Function*
Our Price: $20.38 Retail Price: $39.99 You Save: $19.61 each, a 49% Savings! | 
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Best GPLC & CoQ10 featuring GlycoCarn contains a superior, unique, patented nutritional supplemental form of propionyl L-carnitine, called Glycine Propionyl L-Carnitine (an AminoCarnitine), combined with CoQ10. Propionyl L-carnitine has been well studied for its benefits in promoting the health of energy-intensive muscular tissue, including skeletal muscle and the heart, and has been shown to increase cellular L-carnitine production. The amino acid L-carnitine facilitates the process of energy production in muscle cells. Propionyl L-carnitine is also known to exhibit significant free radical scavenging activity in the circulatory and cardiovascular systems. Studies have also shown that propionyl L-carnitine may increase exercise capacity and overall energy in athletes and supports the overall metabolism of fat.* CoQ10 is a versatile antioxidant which stabilizes cell membranes, protecting them from free radical damage. CoQ10 also supports heart function and promotes energy production in cells. Heart muscle is the most energy-intensive tissue in the entire body. Best GPLC & CoQ10 featuring GlycoCarn combines the powerful cardiovascular support of two potent nutrients into one synergistic formulation designed to optimally support heart and muscle function.* Supports Energy Production in Heart Tissue Propionyl L-carnitine is a natural component of the body’s carnitine pool. Research has shown that it mediates several metabolic effects that may result in enhanced muscle function. Studies indicate that propionyl L-carnitine stimulates the efficiency of energy production in the Krebs’ cycle during conditions in which oxygen levels are low. Propionyl L-carnitine supplies the usable substrate propionate, which can be utilized by the body to produce the Krebs’ intermediate succinate, increasing the efficiency of energy production in vascular tissue. Research suggests that individuals supplementing with propionyl L-carnitine have improved maximal exercise duration and oxygen consumption. A major mechanism of action of carnitine and propionyl L-carnitine in supporting heart function, therefore, appears to be their ability to increase the availability of substrates for energy production in muscle tissue. Coenzyme Q10 is a vitamin-like nutrient found in the human body that works at the cellular level to produce energy for metabolism in the form of ATP. CoQ10 serves as an important cofactor in the electron transport chain, which is the final step in the production of ATP in the mitochondria of cells. Without an adequate supply of CoQ10, cells can become energy-deficient, slowing down a number of critical cellular processes. When cells are nourished with adequate levels of CoQ10, tissues, organs and systems function properly.* Enhances Cardiovascular and Muscle Function Research has shown that the nutrients propionyl L-carnitine and coenzyme Q10 are essential for optimal cardiovascular and skeletal muscle function, as both play major roles in supporting the healthy functioning of heart tissue. Research findings point to the fact that tissue levels of CoQ10 decrease with age. Similar research in animals and humans demonstrate a decrease in tissue L-carnitine levels, resulting in decreased integrity of mitochondrial membranes. Supplementation and replenishment of both nutritional factors may be essential in maintaining healthy cardiac and skeletal muscle function as we age.* Propionyl L-carnitine has been extensively studied in animals and in human clinical trials. The results of this research suggest an enhancement in multiple parameters of heart function with the administration of propionyl L-carnitine. In a rat study of chemically-induced heart toxicity, the administration of propionyl L-carnitine for 2 weeks supported normal beta-oxidation of fatty acids, mediated or induced antioxidant defenses to protect the integrity of heart cell membranes against oxidative damage caused by the chemical agent, and supported normal cardiac function. Human clinical trials of propionyl L-carnitine supplementation show that the nutrient may promote healthy circulatory function, enhance exercise performance, support healthy energy levels and increase muscle strength.* Additional research suggests that CoQ10 has the ability to enhance the contractile function of heart muscle. The heart is the hardest working muscle in the body. Because of its high energy requirements, the heart needs CoQ10 at all times. The highest concentration of CoQ10 in the human body occurs in heart muscle tissue. Numerous clinical studies have demonstrated significant improvements in heart function with oral administration of CoQ10.* While CoQ10 has direct benefits in heart muscle, a parallel mechanism for its protective effect on cardiovascular tissue is likely its potent antioxidant abilities. The reduced form of CoQ10, ubiquinol-10, has been found to protect LDL against oxidative damage by free radicals more effectively than vitamin E. Along with conferring protection to cardiovascular and other tissues, CoQ10 has also been shown to enhancethe levels of other antioxidant vitamins in circulation, such as vitamins, A, C and E.* Promotes Fat Metabolism As mentioned above, propionyl L-carnitine supplementation can increase plasma concentration of L-carnitine. L-carnitine promotes energy production in cells by transporting fatty acids into the mitochondrion. Its primary function is to transfer long-chain fatty acids across the inner mitochondrial membrane. Fatty acid molecules are activated to coenzyme A (CoA) esters in the cytoplasm of the cell, and then attached to an L-carnitine molecule. The combination of a fatty acid molecule and L-carnitine is called “acyl-carnitine.” Much of the body's L-carnitine content is stored in the form of acyl-carnitine.* L-carnitine is required as a transporter to facilitate the passage of fatty acids across the mitochondrial membrane, catalyzing their metabolism for energy production. On the inside of the mitochondrial membrane, the acyl-CoA esters are made available to be metabolized through the process of beta-oxidation. One of the key metabolic byproducts of this process is acetyl-CoA, which enters the Krebs’ cycle to supply fuel for production of ATP, the cell’s primary energy supply. L-carnitine also facilitates the removal of excess short and medium chain fatty acids from the mitochondria that accumulate during cellular metabolism. L-carnitine is then recycled by the body and shuttled back across the mitochondrial membrane to facilitate the process again. Since the heart is dependent on fatty acid oxidation for its functionality, L-carnitine is an essential cofactor for optimal heart health.* Best GPLC & CoQ10 featuring GlycoCarn provides heart-healthy levels of propionyl L-carnitine and CoQ10 in a single formulation. Both nutrients complement each other to support energy production in heart tissue, enhance cardiovascular and muscle health, and promote optimal fat metabolism.*
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Supplement FactsServing Size: One (1) Vegetable Capsule Servings Per Container: 30 | | | | Amount Per Serving | Daily Value | Glycine GPLC (Glycine Propionyl L-Carnitine HCI) providing: | 758 mg | ** | L-Carnitine Propionyl L-Carnitine | 500 mg | ** | | Glycine | 174 mg | ** | | Coenzyme Q10 (CoQ10) | 100 mg | ** | | | Sigma-Tau Industries US patent #6,703,042 B1 andSigma-Tau Industries US patent #6,814,972. | ** Daily Value Not Established. Percent Daily Values are based on a 2,000 calorie diet. |
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| Cellulose, Magnesium Stearate (Vegetable Source), Silicon Dioxide, Vegetarian Capsule |
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| As a dietary supplement, one (1) capsule daily, or more as directed by your healthcare practitioner. |
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| If pregnant or nursing, consult your healthcare provider before taking this, or any, supplement. ... Keep out of reach of children. ... Store in a cool, dry place. |
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| Doctors Best products do not contain milk, egg, wheat, yeast, corn, sugar, sweeteners, starch, salt, preservatives, waxes, coating or colors. Doctor's Best products are also GLUTEN FREE. |
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| Aging, Amino acid deficiency, Cardiovascular Health, Cell Vitality, Cellular Oxidation, Cellular Recharge, Depleted ATP Production, Free Radicals, Heart Health, Heart Vitality, Low Energy, Metabolism, Muscle Fatigue |
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| Adenosine Triphosphate (ATP), Amino Acids, Cardiovascular, Cell, Cellular Function, Fat, Heart, Metabolism Function, Muscles |
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We firmly believe that the integration of scientific research and traditional wisdom is how nutritional and herbal supplements will reach their exciting potential. Founded in 1990 by a pioneering physician committed to science-based alternative health care, Doctor’s Best offers only the most important nutritional supplements. Careful research and precise formula development keeps us at the leading edge of quality, effectiveness, and innovation. Containing the finest quality raw materials from around the world, Doctor’s Best supplements embody the best that traditional knowledge and current scientific research have to offer in the field of therapeutic nutrition. Countless hours have been spent analyzing scientific literature to provide sound alternatives to the proliferation of questionable supplements in the marketplace. Each Doctor's Best product is accompanied by an annotated "Fact Sheet" with detailed background information, structure-function statements, and scientific references that substantiate these statements. All structure-function statements have been filed with the FDA in accordance with DSHEA regulations. Traditional wisdom, up-to-date research, product quality you can trust: everything you need to develop smart strategies for achieving optimal health and well-being. We think you’ll agree that this combination of products and services is second to none. |
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Q. What are your capsules made of? A. Doctor's Best capsules are typical gelatin capsules, with the exception of select products now available in veggie cap form. They are made of gelatin from cattle, like the familiar "Knox gelatin" sold in grocery stores.
The gelatin used to make Doctor's Best's capsules is manufactured in accordance with strict guidelines that ensure it is BSE-free. The FDA and the supplement industry approved these guidelines. The gelatin is made only from cattle living in non-BSE countries. All Doctor's Best capsules are in full compliance with the FDA's September 1997 industry guide, The Sourcing and Processing of Gelatin to Reduce the Potential Risk Posed by Bovine Spongiform Encephalopathy in FDA-Regulated Products for Human Use.
Q. How long does it take for a capsule to dissolve? A. Approximately 30-45 minutes. For 2-piece gelatin capsule, the USP standard for maximum dissolution time is 45 minutes.
Q. How long does it take for a tablet to dissolve? A. FDA Rules & Regulations require tablets to dissolve in 45 minutes or less. However, Doctor's Best sets its standards higher. They require that their tablets dissolve in 30 minutes or less. Every lot of products in tablet form is tested to verify that it dissolves in under 30 minutes.
Q. Can I find out how fast a capsule or tablet dissolves by dropping it in a glass of water or vinegar at home? A. Testing dissolution times at home using vinegar is not an accurate way to learn what happens to capsules and tablets in your stomach. Because stomach acid is much stronger than vinegar, capsules and tablets dissolve much faster in the stomach than in a glass of water or vinegar. Also, the stomach continually "agitates" its contents, much like a washing machine does. |
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Q. Who determines what the daily dosage should be? And how is this done? A. A panel of scientists at The Natural Academy of Sciences performs extensive research, ongoing clinical studies and scientific testing in order to determine the RDI (Recommended Daily Intake).
Q. I see that Silicon Dioxide has been used as an excipient in some of your products. Should I be concerned? A. Silicon Dioxide is a GRAS (Generally Recognized As Safe) food additive. Numerous studies have found the following:
The oral toxicity for humans would be greater than 350 grams in one dose based on allometric comparisons between the mice studied and humans.
A single dose of 2,500mg of amorphous polymeric silicon dioxide to human volunteers did not significantly raise the SiO2 excretion in the urine. This suggests poor absorption of silicon dioxide (Langendorf 1966).
Less than one one-hundredth (1/100th) of the dose was found in urine, suggesting extremely poor absorption (Langendorf 1966).
This would suggest that there is no scientific reason to eliminate silicon dioxide as an excipient at the very low levels found in dietary supplements.
Q. Why is silicon dioxide used as an excipient in Doctor’s Best products? Why are excipients used at all? A. Silicon Dioxide is used as a flow agent to enable "sticky" substances to flow through the encapsulation equipment. If silicon dioxide were not used, other flow agents would have to be used which would actually increase the number of excipients found in a given product. Ideally, the fewer excipients used, the better.
Q. Is there a limit to how many vitamins can be taken safely in one day? A. Our bodies need vitamins and minerals, and if taken in large amounts, vitamins and minerals can adversely affect health. Large amounts of anything can be toxic. Our best advice is to work with a nutritionally aware doctor and follow label directions. |
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1. The Investigators of the Study on Propionyl-L-Carnitine in Chronic Heart Failure. Study on propionyl-L-carnitine in chronic heart failure. Eur Heart J (1999) 20:70-76.
2. Silvestro A, Schiano V, Bucur R, Brevetti G, Scopacasa F, Chiariello M. Effect of propionylcarnitine on changes in endothelial function and plasma levels of adhesion molecules induced by acute exercise in patients with intermittent claudication. Angiology. 2006 Mar-Apr;57(2):145-54.
3. Folkers K, Wolaniuk A. Progress in biomedical and clinical research on coenzyme Q10. Drugs Exptl. Clin. Res. 1984; 10(7):513-517.
4. Lenaz G, Fato R, Degli Esposti M, Rugolo M, Parenti Castelli G. The essentiality of coenzyme Q for bioenergetics and clinical medicine. Drugs Exp Clin Res. 1985;11(8):547-56.
5. Kumaran S, Subathra M, Balu M, Panneerselvam C. Supplementation of L-carnitine improves mitochondrial enzymes in heart and skeletal muscle of aged rats. Exp Aging Res. 2005 Jan-Mar;31(1):55-67.
6. Sayed-Ahmed MM, Salman TM, Gaballah HE, Abou El-Naga SA, Nicolai R, Calvani M. Propionyl-L-carnitine as protector against adriamycin-induced cardiomyopathy. Pharmacol Res. 2001 Jun;43(6):513-20.
7. Barker GA, Green S, Askew CD, Green AA, Walker PJ. Effect of propionyl-L-carnitine on exercise performance in peripheral arterial disease. Med Sci Sports Exerc. 2001 Sep;33(9):1415-22.
8. Hiatt WR, Regensteiner JG, Creager MA, Hirsch AT, Cooke JP, Olin JW, Gorbunov GN, Isner J, Lukjanov YV, Tsitsiashvili MS, Zabelskaya TF, Amato A. Propionyl-L-carnitine improves exercise performance and functional status in patients with claudication. Am J Med. 2001 Jun 1;110(8):616-22.
9. Vermeulen RC, Scholte HR. Exploratory open label, randomized study of acetyl- and propionylcarnitine in chronic fatigue syndrome. Psychosom Med. 2004 Mar-Apr;66(2):276-82.
10. Morisco C, Trimarco B, Condorelli M. Effect of coenzyme Q10 therapy in patients with congestive heart failure: a long-term multicenter randomized study. Clin Investig 1993; 71:S134-S136.
11. Mortensen SA, Vadhanavikit S, Muratsu K, Folkers K. Coenzyme Q10: clinical benefits with biochemical correlates suggesting a scientific breakthrough in the management of chronic heart failure. Int. J. Tiss Reac. 1990; 12(3):155-62.
12. Poggesi L, et al. Effect of coenzyme Q10 on left ventricular function in patients with dilative cardiomyopathy. Current Therapeutic Research 1991; 49(5):878-886.
13. Littarru GP, et al. In vitro effect of different ubiquinones on the scavenging of biologically generated O2. Drugs Exptl. Clin. Res. 1985; 11(8):529-532.
14. Littarru GP, Lippa S. Coenzyme Q and antioxidant activity: facts and perspectives. Drugs Exptl. Clin. Res. 1984; 10(7):491-96.
15. Stocker R, Bowry VW, Frei B. Ubiquinol-10 protects human low density lipoprotein more efficiently against lipid peroxidation than does alpha-tocopherol. Proc. Natl. Acad. Sci. 1991; 88:1646-1650.
16. Borek C. Co-Q10 Energizes the Heart and Brain. Nutrition Science News 1999; 4(7): 322-324.
17. Maher TJ. L-Carnitine and Coenzyme Q10 Continuing Education Module. Natural Healing Track. New Hope Institute of Retailing. March 2000. |
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Our Price: $20.38 Retail Price: $39.99 You Save: $19.61 each, a 49% Savings! |

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