Fountain of Youth?

Not quite a fountain of youth, but researchers have found that niacin, a component of vitamin B3, may be useful in developping anti-aging drugs. The specific component is nicotinamide, which binds to the enzyme sirtuins and inhibits its activity. This enzyme has been used to extend the life of different organisms. Sirtuins may also be able to help with aging-related metabolic disorders like type 2 diabetes and obesity. The way it works is by preventing nicotinamide from binding to the sirtuins. With the information we have now, it is unclear whether it will be able to extend the life in humans, but the possibility that it can help treat diseases is much more palpable.

http://health.msn.com/general/articlepage.aspx?cp-documentid=100155386