GlycoTrax™ GPLC

  • GlycoTrax™ is the most effective, natural GPLC (Glycine Propionyl-L-Carnitine) supplement on the market.

    This unique, high-absorption form of GPLC is shown to support:

    • Promoted blood circulation & blood nitric oxide
    • Improved blood flow (due to dilated blood vessels)
    • Athletic exercise performance, endurance & energy - without the jitters
    • Healthy response to muscle cramps & claudication
    • Healthy sexual support in men

    If you’re looking to support your blood flow or athletic performance, GlycoTrax™ is the extremely potent GPLC supplement to take!


    Jitter-Free Energy To Enhance Your Workouts & Promote Blood Flow

    There are several different forms of L-Carnitine, of which Glycine Propionyl-L-Carnitine (GPLC) is shown to be the most powerful. GlycoTrax™ contains a highly potent dose of GPLC, hard to find in stores and known for its high absorption in your bloodstream.

    This natural amino acid is shown to support blood nitric oxide levels, which promotes dilated blood vessels and healthy blood flow & circulation in your body.

    Ultimately this supports giving you more energy and enhance your exercise performance naturally - without the jitters

    Using a high bioavailability version of GPLC, GlycoTrax™ is the effective endurance supplement you need to support your athletic performance naturally!


    Healthy Sexual Support, Cramps & Claudication

    Managing your blood flow is important, as poor blood circulation can be linked to:

    • Healthy Sexual Support
    • Cramps
    • Intermittent Claudication

    GlycoTrax™ supports nitric oxide in your body, promoting blood flow, dilated blood vessels and blood circulation throughout your entire body. By doing so, it can give you a healthy response to those symptoms caused by poor blood circulation.

    GlycoTrax™ is a highly effective blood circulation, athletic performance and healthy sexual support support supplement - all in one.

    Use it to get the best natural support for your workouts, cramps, AND your sex life!


    Natural, Safe, and Effective

    VitaMonk's products are formulated by licensed doctors and manufactured in state-of-the-art facilities following strict GMP compliance standards.

    We go to great lengths to make sure our supplements meet the highest safety standards. When you use our supplements, you KNOW that you’ll only get the highest quality ingredients that have the most scientific backing to help you get results.


    We Guarantee Results Or Your Money Back

    We are so confident that you'll love this product, that it comes with a 100% money back guarantee.

    Try it now with NO RISK. If for ANY reason you’re not completely satisfied with this supplement after using it, just let us know.  

    You’ll get 100% of your money back! (No questions asked.) 

    *These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

  • Directions & Recommended Use:

    As a dietary supplement, take 2 capsules 1-2 times daily or as directed by your health care practitioner.


    Do not exceed recommended dose. Pregnant or nursing mothers, children under 18 and individuals with known medical conditions should consult a physician before using this dietary supplement. Discontinue use and consult your physician if any adverse reactions occur. Keep out of reach from children. Do not use if safety seal is damaged or missing. Store in a cool, dry place.

A look at GPLC - Glycine Propionyl-L-Carnitine

There are four main types of carnitine products often included in supplement products. These are glycine propionyl-l-carnitine (GPLC), ALCAR, LCLT, and L-carnitine, respectively. Although they all display similar functionalities, the use of some forms are favored over others for specific roles such as the support of cognitive function, the cardiovascular system and heart, athletic performance, weight control, and healthy aging.

Glycine propionyl-l-carnitine is created through binding of the amino acids glycine and propionyl-L-carnitine (PLC). This results in a propionyl ester, in which the carnitine has an added glycine. The GPLC form is thought to have numerous antioxidant effects and may help to support the enhancement of nitric oxide (NO) levels in the blood. It is favored by people undergoing exercise regimes as it may help to enhance training without the jitteriness symptoms sometimes reported with other forms of L-carnitine, it is thought to support healthy blood flow, and it may offer support healthy sexual support in men.

One of the main advantages of GPLC over other L-carnitine types is its relatively improved bioavailability.


GPLC plays a key role in the body’s energy production process. Propionyl-L-Carnitine is metabolized into propionyl coenzyme A and L-carnitine in the mitochondria. An organelle known as the cells energy center. Propionyl coenzyme A is further metabolized into a form that plays a role in the tricarboxylic acid cycle (TCA cycle) [1], which itself plays a key role in cellular aerobic respiration.

The carnitine system helps to support loss of mitochondrial function [1] and is important in the creation of creatine. Propionyl-L-Carnitine is thought to be more effective at supporting healthy blood flow than the L-Carnitine form.

Many people, especially vegetarians, may have natural low levels of carnitine

There tends to be a lower level of circulating carnitine in vegetarians and vegans, older people, and during pregnancy.

As carnitine is naturally found in meat and dairy products it is no surprise that the natural levels of this amino acid have been reported to be much lower in both adult and children vegetarians, especially vegans [2, 3].

In pregnant women, it has been reported that carnitine concentrations are lower in the plasma; this has been suggested to be because the carnitine precursors have lower bioavailability during the gestation period [4].

As people reach old age (above 70), there appears to be an increase in incidence of relative carnitine deficiency [5]. This decrease is correlated to lean body mass. Carnitine may help to support muscle function and to lower fatigue in the elderly [6].

Role in the Support of Enzymes With Antioxidant Activity

As it has an effect upon antioxidant activity, GPLC helps to protect the cells from damage from free radicals. It has been reported to support the stabilization of superoxide dismutase at the blood-brain barrier from the effects of alcohol [7].

It has also been demonstrated to support the response of two further enzymes involved in antioxidant activities: Glutathione peroxidase, and Catalase [8].  Further research also suggests a role for L-carnitine in the support of antioxidant status and oxidative stress responses [9].

Exercise Performance and Muscle Growth and Recovery

When some people exercise they may get a cramping pain in the leg. This is usually a result of the arteries being obstructed, thus limiting blood flow and making it difficult to walk. GPLC may help to support against this through supporting blood flow and circulation [10, 11].

Glycine propionyl-l-carnitine may help to support healthier blood lipid profiles in humans [12]. It has been reported that GPLC may support healthy plasma nitrate/nitrite levels in both sedentary and resistance trained men compared to the controls and placebo [13]. The latter study revealed that short term dosage values of 3 g per day helped some men to improve NO levels in the plasma. Nitric oxide has been put forward as being associated with muscle growth, strength, and performance in numerous studies [13, 14, 15, 16].

GPLC may help to support power output during sprinting. When resistance trained athletes were provided an acute supplement of it before performing Wingate cycle sprints there was an observable support of anaerobic work capacity, peak power production, and lactate accumulation and clearance compared to the baseline [17, 18]. The improved sporting performance, reported over several weeks of testing, appears to be dosage dependent.

Healthy Sexual Support Function

As well as being associated with muscle energy, the signaling molecule NO has been linked to supporting healthy sexual support in men most likely through its role as a vascular regulator [19]. Markers associated with NO and lipid peroxidation may be elevated through supplementation with GPLC in some men [12].

The combination of Acetyl-L-Carnitine and PLC has been reported as supporting mood, fatigue, and healthy sexual support in the elderly [20].

Further Reading


  • (1) Stack advice, daily Nootropic recommendations {}
  • (2) Does Glycine Propionyl L-Carnitine HCl work better then just L-carnitine? Including a post about its effects on relaxation vs the aggressiveness sometimes associated with ALCAR {}
  • (3) Pre workout and pre-study strategy {}


  • (1) An overview of Propionyl-L-carnitine, its uses, side effects, interactions, and recommended dose. {}
  • (2) A look at Levocarnitine / Carnitor {}

  • L- carnitine, use, doing it for exercise benefits, drug interaction, protocol, and adverse reactions, and its nutritional and metabolic action {} 


  • Role as a nitric oxide (endothelium derived relaxing factor (EDRF); NO; NOX) stimulant and ergogenic aid {} 


  • Guide to PLC {}

Citations, Reviews, Abstract, and References

[1] Binienda et al. The Mitochondriotropic Effects of L-carnitine and its Esters in the Central Nervous System. Current Medicinal Chemistry - Central Nervous System Agents, Volume 3, Number 4, December 2003, pp. 275-282(8)

[2] Lombard et al. Carnitine status of lactoovovegetarians and strict vegetarian adults and children. Am J Clin Nutr. 1989 Aug;50(2):301-6.

[3] Krajcovicová-Kudlácková et al. Correlation of carnitine levels to methionine and lysine intake. Physiol Res. 2000;49(3):399-402.

[4] Ringseis et al. Low availability of carnitine precursors as a possible reason for the diminished plasma carnitine concentrations in pregnant women. BMC Pregnancy Childbirth. 2010 Apr 25;10:17. doi: 10.1186/1471-2393-10-17.

[5] Malaguarnera et al. L-Carnitine treatment reduces severity of physical and mental fatigue and increases cognitive functions in centenarians: a randomized and controlled clinical trial. Am J Clin Nutr. 2007 Dec;86(6):1738-44.

[6] Pistone et al. Levocarnitine administration in elderly subjects with rapid muscle fatigue: effect on body composition, lipid profile and fatigue. Drugs Aging. 2003;20(10):761-7.

[7] Haorah et al. Stabilization of superoxide dismutase by acetyl-l-carnitine in human brain endothelium during alcohol exposure: novel protective approach. Free Radic Biol Med. 2011 Oct 15;51(8):1601-9. doi: 10.1016/j.freeradbiomed.2011.06.020

[8] Cao et al. Single dose administration of L-carnitine improves antioxidant activities in healthy subjects. Tohoku J Exp Med. 2011;224(3):209-13. doi: 10.1620/tjem.224.209.

[9] Fatouros et al. Effects of L-carnitine on oxidative stress responses in patients with renal disease. Med Sci Sports Exerc. 2010 Oct;42(10):1809-18. doi: 10.1249/MSS.0b013e3181dbacab.

[10] Hiatt et al. Propionyl-L-carnitine improves exercise performance and functional status in patients with claudication. Am J Med. 2001 Jun 1;110(8):616-22.

[11] Brevetti et al. European multicenter study on propionyl-L-carnitine in intermittent claudication. J Am Coll Cardiol. 1999 Nov 1;34(5):1618-24.

[12] Bloomer et al. Glycine propionyl-L-carnitine modulates lipid peroxidation and nitric oxide in human subjects. International Journal of Vitamin and Nutrition Research. 2009 May;79(3):131-41. doi: 10.1024/0300-9831.79.3.131.

[13] Stamler et al. Physiology of nitric oxide in skeletal muscle. Physiol Rev. 2001 Jan;81(1):209-237.

[14] Bescós et al. The effect of nitric-oxide-related supplements on human performance. Sports Med. 2012 Feb 1;42(2):99-117. doi: 10.2165/11596860-000000000-00000.

[15] Rovere-Querini et al. Nitric oxide and muscle repair: multiple actions converging on therapeutic efficacy. Eur J Pharmacol. 2014 May 5;730:181-5. doi: 10.1016/j.ejphar.2013.11.006.

[16] Smiljić et al. Modulatory role of nitric oxide in cardiac performance. Med Pregl. 2014 Sep-Oct;67(9-10):345-52. Review.

[17] Jacobs et al. Long-term glycine propionyl-l-carnitine supplemention and paradoxical effects on repeated anaerobic sprint performance. J Int Soc Sports Nutr. 2010 Oct 28;7:35. doi: 10.1186/1550-2783-7-35.

[18] Jacobs et al. Glycine propionyl-L-carnitine produces enhanced anaerobic work capacity with reduced lactate accumulation in resistance trained males. J Int Soc Sports Nutr. 2009 Apr 2;6:9. doi: 10.1186/1550-2783-6-9.

[19] Burnett et al. The role of nitric oxide in erectile dysfunction: implications for medical therapy. J Clin Hypertens (Greenwich). 2006 Dec;8(12 Suppl 4):53-62.

[20] Cavallini mp et al. Carnitine versus androgen administration in the treatment of sexual dysfunction, depressed mood, and fatigue associated with male aging. Urology. 2004 Apr;63(4):641-6.

[21] Gentile et al. Effect of propionyl-L-carnitine, L-arginine and nicotinic acid on the efficacy of vardenafil in the treatment of erectile dysfunction in diabetes. Curr Med Res Opin. 2009 Sep;25(9):2223-8. doi: 10.1185/03007990903138416.

[22] Alvarez de Sotomayor et al. Effect of L-carnitine and propionyl-L-carnitine on endothelial function of small mesenteric arteries from SHR. J Vasc Res. 2007;44(5):354-6

[23] Mingorance et al. Oral supplementation of propionyl-l-carnitine reduces body weight and hyperinsulinaemia in obese Zucker rats. Br J Nutr. 2009 Oct;102(8):1145-53. doi: 10.1017/S0007114509389230.


I am a vegetarian; can I take your supplements?

Yes, our products are suitable for vegetarians. This is especially relevant in the case of Glycine propionyl-l-carnitine, as vegetarians and vegans are reported to have much lower natural levels of l-carnitine than omnivores.

Are there any side effects associated with taking L-carnitine?

The most common minor side effects are diarrhea, headache, nausea, vomiting, and stomach cramps. There are a few more moderate side-effects, such as faster heartbeat, fever, and raised blood pressure. For a more in-depth look at possible side effects please see this article: [].

As with any drug or medication, it is recommended that you cease use and consult your doctor or medical professional at the first instance, if you see any unwanted effects when taking GPLP dietary supplements.

What is Glycine propionyl L-carnitine (GPLC)?

It is a combination of the amino acids glycine and PLC. L-carnitine is produced by the body and can be readily converted into GPLC or ALCAR.

Who is most susceptible to GPLC deficiency?

Vegetarians, the elderly, pregnant women, and those suffering from conditions that affect blood glucose levels or the arteries [21–23].

Is it good for the treatment of male menopause?

Many men take GPLC to help support problems associated with fatigue and sexual performance.

In addition to GPLC, what other forms are there, and what are some of the other names for it / them?

Acetyl-L Carnitine HCL (also known as ALCAR, often taken for its supposed brain boosting effects); Levocarnitine; (R)-Carnitine; Carnitor; and Vitamin BT. The IUPAC name of L-Carnitine is (3R)-3-hydroxy-4(trimethylazaniumyl)butanoate.

What is L-carnitine and L-tartrate?

L-tartrate is an antioxidant. Carnitine may help to support the transport of toxic products from the, and fatty acids to the, mitochondria.

Does it have any benefits for bodybuilding?

It is thought to support NO and thus may help to improve blood flow during periods of increased exercise intensity. Bodybuilders sometimes like to stack with HMB and FenuTrax™

How many minutes before exercise for a significant effect?

Many people take it 15 to 30 minutes before exercising, as this is thought to produce a greater benefit.


See this article on for findings on this group []

What is the use of L carnitine?

It plays a role in support energy production and supporting enzymes with antioxidant properties.

How much L-carnitine should I take?

1 g is thought to be effective. There are reports that some of the health benefits that it may support are dosage dependent, with higher dosages of up to 3 to 4.5 grams noted to be used in some clinical trials.

Is carnitine a stimulant?

It may have beneficial stimulatory effects as a result of its role in energy production via the transport of fatty acids.

What foods are high in L carnitine?

If you want to include more carnitine in your diet than you may need to increase your consumption of red meat and dairy products. Other carnitine rich foods include greens, sprouts, buckwheat, and rice bran.

How many servings are there in a container of VitaMonk GlycoTrax™

There are 30 servings per tub (the serving size is two capsules). Each capsule contains 500mg of GPLC. Our products are gluten free.

What Supplements Can I Stack With GPLC?

Users stack all kinds of products with GPLC. Some possibilities include:

Where can I buy GlycoTrax online?

As well as being for sale online here, you can buy them from Amazon. We offer free shipping on all purchases over $35.

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