Fantastic Lad writes: Smoking may be bad for you, but Researchers and biotech companies are quietly developing pharmaceuticals that are decidedly good for brains, bowels, blood vessels and even immune systems — and they're inspired by tobacco's active ingredient: nicotine. Nicotine acts on the acetylcholine receptors in the brain, stimulating and regulating the release of a slew of brain chemicals, including seratonin, dopamine and norepinephrine. Now drugs derived from nicotine and the research on nicotine receptors are in clinical trials for everything from helping to heal wounds, to depression, schizophrenia, Alzheimer's, Tourette Syndrome, ADHD, anger management and anxiety. Smoking will kill you, but also keep you in good health? Another story about nicotine warding off Parkison's disease here seems to agree. -Who knew?