Study anatomy and kinesiology and you'll see that FLEX will get you flamed.
Start here... http://www.exrx.net/Lists/Directory.html This is an excellent site to start learning.
As you can see there are 3 muscles in realtionship to the chest.
As for the first part of your question, no you...
Good Post -
Here is an article on the benefits etc of Glucosmine and Chondroiton.
In a nutshell, these two supplements help to reginerate growth and development of the joints and tissues. They help to resolve current issues but only after time as they can only repair as they build.
It's not a matter of how much you weigh bro. It's more a matter of your knowledge of what your body is able to accomplish and how chemical's effect your body.
As of right now your diet shows that you know nothing in regards to nutrition and that is the basis of all AAS gains/benefits. Calculate...