This company is working on a way to deliver nicotine through the digestive system without irritation. They're also working on a better trans-dermal (skin patch) system for nic, cannabinoids, vitamins... Cool science.
http://www.stockhouse.com/news/pres...science-corp-begins-nicotine-absorption-study
http://www.stockhouse.com/news/pres...science-corp-begins-nicotine-absorption-study