US Patent 7291598 - Nanoparticles for insulin delivery

http://www.freepatentsonline.com/7291598.html

This patent from GP Medical and National Tsing Hua University discloses a chemical composition for nanoparticulate insulin delivery to treat diabetes. Claim 1 reads:

1. A method of treating diabetes of a patient comprising orally administering insulin containing nanoparticles with a dosage effective amount of said insulin to treat said diabetes, wherein at least a portion of said nanoparticles comprises chitosan substrate and poly(glutamic acid).