Has anyone tried Amino Acids to stop hair loss and encourage regrowth?  I'm thinking of taking Amino Acids for Hair Regrowth, and wanted to see if there are any potential side effects (L-Cystine, L-Methionine, L-Lysine, L-Arginine).

I found an interesting article, below, which lists important Amino Acids that may help with hair loss and growth. 

http://www.ehow.com/facts_4812042_amino-acids-fast-hair-growth.html