Three regions are especially affected: the hippocampus, which is important in retrieving long-term memories; the amygdala, which forms part of the fear network; and the frontal lobes.
The site offers forums for health-conscious consumers, a support network for individuals with long-term health issues and a community of credentialed doctors.
The study tracked more than 300, 000 people over seven years and concluded that having a good support network is as influential a factor in your long-term health as whether or not you're a smoker.