The article Rick gave you should answer all your questions. The problem with GHRP-6...is finding legit peptides. Most peptides on the market are fake. It's really hit or miss.
I recommend the SARM nutrabol as an alternative. It is an HGH analogue, just like GHRP, but it is an oral and you can atleast be certain of what you are putting in your body. I found to get better results from it then GHRP as well. sarms1.com carries a great product. Nutrobal (Mk-677) Growth Hormone - Evolutionary.org