You’re a bodybuilder — for you, a muscle “pump” is a very good thing, as is the ability to train harder and longer. If that sounds familiar, you definitely want to know more about glycine propionyl-L-carnitine, otherwise known as GPLC or GlycoCarn.
Previous studies have shown GlycoCarn significantly elevates nitric oxide levels at rest, which increases blood flow to tissues. With that in mind, researchers from Florida Atlantic University set out to discover whether GPLC supplementation enhances exercise performance in healthy, trained individuals.
They studied 24 resistance-trained men who took 4.5 grams of GPLC or a placebo and participated in two test sessions consisting of five 10-second cycle sprints separated by one minute of active recovery, each session a week apart. The results, published in the April 2009 issue of the Journal of International Society of Sports Nutrition, showed that sprint power output was 15 percent greater among those taking GPLC, while lactic-acid values were 15.7 percent lower four minutes after exercise. Blood lactate was more than 16 percent lower 14 minutes post-exercise in the GPLC group.
The bottom line: Taking GPLC can enhance peak power production while helping lower workout-crimping lactic-acid levels, a win-win for any hard-training bodybuilder.