GPLC: Glycine Propionyl L-Carnitine.

GPLC is L-Carnitine with the added glycine component. Glycine synthesizes creatine, boosts growth hormone levels, and increases NO levels. L-Carnitine enhances testosterone effects and increases fat-burning and NO levels.

Combined with L-Arginine this will boost NO levels greater than either of the supplements consumed separately.

For weight training:
Consume 3-5 grams of L-Arginine daily on an empty stomach.
Add 2-3 grams of GPLC to your pre- and post- workout meals for the combined effect of increased NO. Take 2 grams with your morning meal on rest days.

Nitric Oxide (NO) Boosters.

Most NO boosters have one thing in common: their active ingredient is arginine. However, they usually contain a whole host of ingredients that bump up the effectiveness of L-Arginine. Nitric oxide, a gas produced naturally in the body, is responsible for numerous processes, but the most important for bodybuilders is vasodilation: NO causes the smooth muscle cells of blood vessels to dilate, allowing more blood to flow through. The more blood flow, the more oxygen, nutrients and anabolic hormones your museles can get to fuel workouts, repair post-workout damage and ultimately grow.

NO-boosters are mainly used by avid weight-lifters and body builders to achieve more "pump" (blood vessel dilation causing more blood flow to muscles). Personally, I take little to no NO boosters for my regimen. Sometimes, the creatine compound I drink has 1 gram of L-Arginine (NO booster). I haven't really been able to tell the difference when I've used it. If you are really enthusiastic about about beginning a strict training regimen, I recommend you try this a 2 months after implementing whey-protein, casein protein, glutamine, and creatine into your nutrition. In the meantime, more blood flow can be achieved through pre- and post- workout stretching, and great lifting technique.