Carnitine MTX: 5 Carnitine’s in One
About 98% of the carnitine of the human body is present in skeletal and heart muscle. L-carnitine plays a significant role in fat metabolism. L-Carnitine is present in foods, especially red meat, and some dairy foods. Animal products are rich sources of Carnitine while plant foods contain considerably lower levels. L-Carnitine is an essential nutrient in lipid metabolism, which promotes the transportation of long-chain-fatty-acids across the mitochondrial membrane, thus allowing the cells to break down fat and release energy from reserves of stored fat. As a result, those on a vegan/ vegetarian diet or those who restrict red meat intake will be most likely to have a deficiency. For example, 100g of beef steak has 94mg of L-carnitine, 100g of chicken breast has 3.9mg of L-carnitine, and 100g of asparagus has 0.195mg of L-carnitine. All tissues that use fatty acids as an energy source require carnitine for normal function during fatty acid oxidation. Also, evidence strongly demonstrates that long-term oral L-carnitine administration is effective for fatigue during weight loss. L-carnitine has been shown to support the heart and cardiovascular system, help athletes optimize their performance, help burn fat more quickly, help rejuvenate our aging brains. Carnitine MTX™ combines five different variations of carnitine to support your overall fitness goals. This superior formulation of advanced carnitines (L-Carnitine Fumarate, L-Carnitine L-Tartrate, Acetyl-L-Carnitine, L-Carnitine HCL, L-Carnitine Base) operates by its unique complex that may assist in cardiovascular function, energy metabolism and the body’s ability to effectively burn fat. Incorporating these various forms of carnitine in Carnitine MTX may also support the bioavailability so the body can utilize this amino acid more efficiently.*
Carnitine for Performance Enhancement
A new study suggests that carnitine can also improve sprinting capacity by lowering lactic acid production and preventing fatigue. In a randomized, double-blind placebo-controlled crossover trial, researchers tested the effects of l-carnitine on endurance in 26 professional soccer players. Subjects between the ages of 17-19 years old were randomized to receive either 3g or 4g of carnitine as a powder mixed with fruit juice. Athletes were given their assigned carnitine supplemented drinks 1 hour before endurance testing. The athletes were asked to run on a treadmill beginning at a speed of 8km/h (~4mi/h), which was then later increased to 10km/h (~6mi/h) and progressively 1km/h every 3 minutes until subjects could not continue. Researchers gave them a 1-minute break between accelerations. One week later the test was repeated using a placebo mixed into the fruit juice. Researchers collected blood samples before the trial and before each acceleration in running speed to determine lactic acid levels in the blood. Results showed that athletes taking l-carnitine (both 3g and 4g) had significantly lower lactic acid build up during the test compared to their results taking the placebo. This means that the onset of fatigue was delayed in these athletes during carnitine supplementation. Furthermore, when the athletes were supplemented with carnitine, their perception of fatigue was significantly lower. Overall, Carnitine had a significant effect of lowering lactate levels in the blood, which, in turn, decreases the onset of fatigue.
Carnitine for Better Muscle Pumps
A lesser known effect of taking carnitine is better muscle pumps. Researchers investigated the effect of acute L-carnitine supplementation at two different doses on nitric oxide (NO) production and oxidative stress after exhaustive exercise. The subjects were 26 healthy males aged 17-19 years. Subjects were randomly divided into two groups of 13 each and received 3 or 4 g L-carnitine via a glass of fruit juice. One week later, the test was repeated on the same athletes with placebo fluids. At the end of the study, the group that received L-carnitine applied at a 3 g dose provides strong antioxidant action by increasing the antioxidant glutathione levels and NO levels and decreased the lipid peroxidation levels (damage to cells). L- Carnitine not only can improve exercise performance, but it may also result in better pumps in the gym.
L-Carnitine L-Tartrate: Enhances Muscle Recuperation
Carnitine in the form of L-carnitine tartrate is a biochemical that is synthesized in the liver and kidneys from the amino acids lysine and methionine. L-Carnitine-L-Tartrate (LCLT) is a form of carnitine that is used for muscle recovery and assisted the functioning of muscle androgen receptors. Supporting testosterone is not going to provide the gains in lean muscle mass if there are no androgen receptors to bind with. One study found when men were given 2g of LCLT (divided into two portions per day) for three weeks; they experienced an increase in androgen receptors. LCLT has also been found to lower the production of free radicals and decrease muscle damage and soreness after exercise.
L-Carnitine-L-Tartrate (LCLT) is used for muscle recovery and assisted the functioning of muscle androgen receptors. Supporting testosterone is not going to provide the gains in lean muscle mass if there are no androgen receptors to bind with. One study found when men were given 2g of LCLT (divided into two portions per day) for three weeks; they experienced an increase in androgen receptors. LCLT has also been found to lower the production of free radicals and decrease muscle damage and soreness after exercise. LCLT has recently been found to support fat loss and recovery from exercise. In the latest study from the Shahid Chamran University in Iran shows that supplementation of L-Carnitine L-Tartrate (LCLT) improved performance by increasing fat metabolism. Researchers had 20 healthy elite male wrestlers participate in this single-blind clinical trial. The participants were randomly divided into two groups including test and placebo. The test group received 3 grams of LCLT carnitine in 200 ml water and six drops of lemon juice. The placebo group consumed only 200 ml water and six drops of lemon juice, 90 minutes before the intense exercise protocol. Blood samples were collected 90 minutes before the activity, immediately after the exercise, and 30 minutes after rest and their serum fat levels were measured. At the end of the study, the group receiving LCLT resulted in a significant increase in fatty acid metabolism, VO2 max, and distance run. The control group was not affected by placebo drink. The results of the present study showed that supplementation of LCLT improved exercise performance by increasing fat metabolism.
Acetyl-L-carnitine (ALCAR) is an acteylated form of L-carnitine that assists in cardiovascular function, energy metabolism, and weight management. ALCAR has been shown to be very effective in alleviating the side effects of aging, like neurological decline and chronic fatigue. ALCAR supplementation is also a very safe method of improving insulin sensitivity and blood vessel health, particularly for people with delicate or weakened cardiac health. ALCAR can also protect neurons and repair certain damage, such as that caused by diabetes and diabetic neuropathy.
Most people who do not see results with L-carnitine supplements are probably not taking enough. Most of the scientific literature describes effective doses from 1 to 4 grams of L-carnitine.