Anyone ever use GNCs L - Arginine?

Underground
1

 I was going to pick up GNC`s L- Arginine 5000 powder and was wondering if anyone here has ever tried it. Did it work as well as others if so?

2

GNC = poor quality, over-priced products + unethical salespeople.  Avoid.

3

where to buy products if not gnc

4

Vitamine Shoppe?