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Recover better with L-Carnitine L-Tartrate
Clinical research has shown that LCLT increases fatty acid oxidation and reduces free radical production, which may prevent drops in strength during exercise.
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As well, there is relatively recent evidence that daily LCLT supplementation after resistance exercise results in increased androgen (testosterone) receptor content in skeletal muscle. There are also a number of recent studies that show that LCLT substantially benefits muscle recovery, by the above mechanisms, in healthy young individuals.
Unfortunately, as we approach middle age our tolerance for exercise goes down. This is (at least partially) due to increased free radical formation and decreases in anabolic hormone production/activity associated with aging. However, new evidence shows that LCLT can substantially buffer these aging effects. In a study published in the August 2010 issue of Metabolism, scientists from the University of Connecticut (USA) and University of Jyvaskyla (Finland) had middle-aged men and women consume 2g of LCLT per day for 3 weeks and 3 days. After 3 weeks, subjects completed a heavy leg exercise protocol to induce muscle damage and soreness. In men and women, post-exercise blood markers of purine metabolism, free radical formation, muscle tissue damage, and muscle soreness were significantly decreased.

Ho JY, Kraemer WJ, Volek JS, Fragala MS, Thomas GA, Dunn-Lewis C, Coday M, Häkkinen K, Maresh CM. L-Carnitine L-tartrate supplementation favorably affects biochemical markers of recovery from physical exertion in middle-aged men and women.  Metabolism. 2010 Aug;59(8):1190-9.