Coincidentally I've been posting some stuff about B3 (Niacin) in another thread and there's this little piece of info on one of the websites:
* Treating peripheral artery disease (PAD)
* Treating or preventing migraines
* Treating depression
* Treating or preventing motion sickness
* Treating Meniere's disease
* Promoting relaxation
* Decreasing the risk of Alzheimer's disease
* Decreasing the risk of cataracts
* Reducing diarrhea and fluid loss caused by cholera
* Preventing type 1 diabetes in high-risk children (nicotinamide only)
* Preserving some of the function of insulin-producing cells in people with type 2 diabetes or early type 1 diabetes
* Treating osteoarthritis
* Treating attention deficit hyperactivity disorder (ADHD) when used in combination with high-dose vitamins (nicotinamide only)
* Treating schizophrenia.
http://cholesterol.emedtv.com/niacin/ni ... ts-p2.html