Glycine propionyl-L-carnitine hydrocholoride (GPLC)

Glycine propionyl-L-carnitine hydrocholoride (GPLC) is a fairly new ingredient to enter into the bodybuilding supplementation world. It sold by a company called Sigma-Tau health sciences. They are the company that actual makes the product. It is marketing to supplement company’s as being the only true product to raise nitrate levels in the blood. Ie a nitric oxide product. Sigma-tau provides research and real data to support this claim. They also make claims on their website http://www.glycocarn.com/index.html that L-arginine and their related products do nothing for nitrate levels in the blood. This website is great if you like to read about real research and real products. Sigma-Tau sells the shit out of this product to many, many supplement company.s. I quickly counted on their “products” part of their website and counted about 50 company’s that carry the GPLC in their products.

Now here’s the bad news. #1 the product tastes like shit and is very expensive to use. The studies that I have read show that one must use 4 grams of GPLC for a serving size. Thus if you look at the GPLC sold at protein factory.com you will notice it cost $65.00 for a measly 150 grams. That’ll last you about 1 month. So I went ahead and looked at what other supplement company’s were selling their GPLC for.

Well here’s what I found.

http://www.bodybuilding.com/store/sts/nitrocarn-gplc-fusion.html

This product contains only 1.5 grams of GPCL in 4 capsules and you only get 15 servings per bottle. So what this supplement company did is either didn’t read the study that it takes 4 grams of GPLC to work or made a conscience decision to rip you off. http://www.maxmusclelincoln.com/Productpdf/MaxNitroEXT_PDS.pdf

Here’s another product I found that contains GPLC but along with a bunch of 10 other things in their “proprietary formula”. It equates to only 3.65 grams. So barely enough to give you the 4grams required.

Thus when trying to find GPLC make sure you get one with the correct serving size of 4 grams of GPLC per serving. Don’t be fooled by proprietary formulas. If you see a GPLC product with other ingredients like L-arginine or things like it. I don’t recommend you buy it.

I recommend these GPLC products.

1) Proteinfactory.com Nitric Oxide GPLC ( of course). It contains 4 grams per serving.

2) MHP N.O. Bomb.

3) and uhhh yea. These are the only two products I could find listed on the Sigma-tau website that actually gives you 4 grams per serving. So out of the 20 or so sports nutrition company’s that use this product only 2 use it correctly. The other don’t or they plead the 5th (proprietary ingredients)