Of the participants, 90 developed Alzheimer’s disease. Experts also performed a brain autopsy on the 102 participants who died. Related StoriesNew technique helps research protein changes in brain tissue of Alzheimer's patientsEight myths and truths regarding Alzheimer's diseaseCollaborative approach may speed discovery of new preventive treatments for Alzheimer's diseaseThe study found a cognitively dynamic person in old age was 2.6 times less inclined to develop dementia and Alzheimer’s disease when compared to a cognitively inactive person in old age.SOURCE Johns Hopkins Hospital.. Bring individuals Dark Circles to light A complete lot of social pressure, piled-up tasks, family duties, and never-ending bills could cause sleeplessness and anxiety that you can’t hide for long. Even if you don’t state it out load, your face will. How embarrassed you get when you attend a party to meet up your friends after a long time, wearing the make-up on however your eye circles are screaming loudly about your happenings; and then one of the close friends in the group begins poking you about your life and instantly you hate it! There are also other notable causes of eye circles, which you might or might not know: *Extreme or constant exposure to sun can darken your skin *Allergies, asthma and eczema are related to dark directly, under-vision circles *Lack of vitamins and improper dietary intake could cause the puffiness *Attention circles are a symptom of liver problems *Medicines which may be dilating the blood vessels can darken the under-eye skin because of increased blood circulation *Heredity is another cause of eye circles *Smoking habits, leading to vascular complications and effecting eye *Excessive salt intake thus, causing the body to retain water in addition to impairing blood circulation But hang on there! This is not the finish of the global world.