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- Giving Up the Guns When a Family Member Has Alzheimer’s
- Care Management Program Is Reducing Need for Anti-anxiety Medication and Visits to the Hospital/Emergency Room
- Talking to a Loved One With Alzheimer’s
- 10 Powerful Ways to Commemorate Alzheimer’s Awareness Month
- Making the Most of Mealtimes for People With Alzheimer’s
- Family Members Provide 100 Hours a Month of Unpaid Care for Alzheimer’s
- Alzheimer’s Caregivers Should Be Screened for Depression
- Alzheimer’s Care Costs Far More Than Heart Disease or Cancer Care
- Obesity at Midlife May Speed Alzheimer’s Onset
- Hello from my mom
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- Heart Rhythm Disorder, A-Fib, Tied to Dementia Risk
- Daytime Sleepiness Tied to Alzheimer’s Brain Changes
- Stress May Affect Memory and Brain Size
- Memory and Thinking Skills May Wane in Winter Months
- High Blood Pressure at Age 50 Tied to Dementia Later in Life
- High Fat, High Sugar Diet Tied to Alzheimer’s Brain Changes
- Kidney Dialysis Patients at High Risk of Alzheimer’s Disease
- Daytime Sleepiness May Be Early Warning Sign of Alzheimer’s
- Alzheimer’s Disease Increases the Risk of Falls
- High Blood Sugar Tied to Memory Decline
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- Experimental Drug, Fails to Benefit Alzheimer’s Patients
- New Drug Shows Promise for Alzheimer’s
- Pain Relievers Present Special Hazards in People With Alzheimer’s Disease
- Care Management Program Is Reducing Need for Anti-anxiety Medication and Visits to the Hospital/Emergency Room
- Music May Ease the Anxiety of Alzheimer’s
- Experimental Alzheimer’s Drug, Intepirdine, Disappoints in Study
- An Eye Scan for Alzheimer’s?
- Drug to treat Alzheimer’s is Ranked Highest
- Patients Often Fail to Adhere to Alzheimer’s Drug Schedules
- Could Treatments for Diabetes Help Treat Alzheimer’s?
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- To Drive or Not to Drive? Questions to Ask
- Exercise May Prevent Falls in Those with Alzheimer’s Disease
- The Driving and Car Key Dilemma of Alzheimer’s Disease
- Healthier Heart, Healthier Brain
- 2 Hours a Week of Exercise Can Boost Brain Health
- ‘Exergames,’ Which Combine Exercise and Games, May Benefit Brain Health
- Eat Fish, Fruit, Vegetables and Nuts for Brain Health
- Beet Compound Shows Promise Against Alzheimer’s
- A Single Night of Not Sleeping Tied to Alzheimer’s Brain Changes
- Should Alzheimer’s Patients Drink Coffee?
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- Some 44 Million People Have Alzheimer’s Worldwide
- Nearly 14 Million Americans Will Have Alzheimer’s Disease by 2060
- Alzheimer’s Rates Could Double in Coming Decades
- Combining Care Program With Medication Reduces Alzheimer’s Symptoms By 750%
- Fisher Center Scientists make two new Significant Discoveries in the battle against Alzheimer’s
- Dementia Rates Are Slowing, but Alzheimer’s Cases Continue to Rise
- Fisher Center Scientists Create a Novel Imaging Technology Allowing the 3D Visualization of Brain Defects That Cause Alzheimer’s Disease
- Negative Beliefs About Aging Could Prime the Brain for Alzheimer’s
- Recognizing Faces Is a Challenge for Those With Alzheimer’s
- Fisher Center Scientists Discover Pathway That may Lead to Alzheimer’s Disease
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- Fisher Center For Alzheimer’s Research Foundation Wins Fall 2018 Digital Health Awards®
- Fisher Center for Alzheimer’s Research Foundation Earns Gold Seal of Transparency from GuideStar
- The Fisher Center for Alzheimer’s Research Foundation Earns Coveted 4-Star Rating from Charity Navigator for the 7th Consecutive Year
- Hear Kent Karosen, President and CEO of the Fisher Center for Alzheimer’s Research Foundation, describe his new book and the power of art therapy
- Fisher Center Scientists link a Mutation That Protects Against the Development of Alzheimer’s Disease
- Newly Inducted Into the Basketball Hall of Fame, Shaquille O’Neal, Joins the Fisher Center for Alzheimer’s Research Foundation to Raise Funds for Groundbreaking Research in the Quest for a Cure
- Pat Summitt, legendary women’s basketball coach, dies at 64
- Celebrating the life of Nancy Reagan for her Impact on the Fight to end Alzheimer’s
- WRNN Interview
- Fisher Center’s 20th Anniversary Celebration and recent activities
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Low Vitamin D Levels Linked to Memory Decline
Vitamin D, the so-called “sunshine vitamin” long linked to healthy bones, has also been hailed as a possible protector against heart disease, diabetes and obesity. Now, a new study from Italy finds that the vitamin may be important for brain health and preventing the memory decline of Alzheimer’s disease.
The study, published in the Archives of Internal Medicine, involved 858 men and women ages 65 years and older. In the six-year study, those with the lowest blood levels of vitamin D were most at risk of memory, learning and thinking problems.
It is estimated that well over half of older adults in the United States and Europe are thought to be deficient in vitamin D, the researchers report, with some estimating that virtually all seniors are deficient in the vitamin. The body makes vitamin D in the skin on exposure to the sun. But seniors tend to get less sun exposure than younger people, and the body’s ability to produce vitamin D declines with age.
Other researchers have provided convincing evidence that vitamin D supplementation can lower the risk of developing Alzheimer’s disease in people who suffer from vitamin D deficiency but not in people who have adequate levels of vitamin D in their body.
Vitamin D may play a role in the formation of nerve cells, including tissue in the brain. The nutrient may also aid the brain by maintaining levels of calcium, a mineral critical for sending signals from one nerve cell to the next, and by helping to rid the brain of beta-amyloid, which in excess forms the brain plaques of Alzheimer’s disease.
The researchers, from the University of Exeter in England, assessed blood levels of vitamin D at the start of the study, then again after three and six years. Participants were also given regular tests of memory, attention, planning and thinking skills.
Compared to those with normal vitamin D levels, seniors with the lowest levels of 25-hydroxyvitamin D, a form of the vitamin that circulates in the blood (they had levels of less than 25 nanomoles per liter of blood), were 60 percent more likely to have substantial memory and thinking decline over the six-year study period. They also were 31 percent more likely to experience declines on tests measuring executive function, or the ability to plan and execute tasks.
“If future prospective studies and randomized controlled trials confirm that vitamin D deficiency is causally related to cognitive decline, then this would open up important new possibilities for treatment and prevention,” the authors concluded.
“Very importantly, such trials will also provide an opportunity to systematically assess potential harms of vitamin D supplementation, an issue that has been largely overlooked or dismissed,” wrote doctors from the University of Auckland in New Zealand, in an editorial accompanying the study.
Vitamin D is found naturally in some foods like fish, but you would have to eat a 3.5 ounce portion of salmon daily to get the recommended 600 IUs of the vitamin. Vitamin D is also added to milk, but it would take a daily quart to get the recommended dose. Spending 15 minutes or so in the sun each day, without sunscreens is sufficient to stimulate the skin to to produce adequate levels of the vitamin. But because of skin cancer risk, excessive sun exposure is not generally recommended.
Some doctors are recommending higher daily doses of 2,000 IUs or more as supplements, but the long-term effects of such high amounts are unknown. Vitamin D is fat soluble and remains in the body, stored in fat. Side effects of taking excessively high doses of vitamin D supplements can include digestive problems, headache, irregular heartbeats and extreme fatigue.
More study is needed to determine the role of vitamin D in brain health and Alzheimer’s prevention.
Source:
By ALZinfo.org, The Alzheimer’s Information Site. Reviewed by William J. Netzer, Ph.D., Fisher Center for Alzheimer’s Research Foundation at The Rockefeller University.
David J. Llewellyn, Ph.D., Iaian A. Lang, Ph.D., Kenneth M. Langa, M.D., Ph.D. et al: “Vitamin D and Risk of Cognitive Decline in Elderly Persons.” Archives of Internal Medicine, Vol. 170 (No. 13), July 12, 2010, pages 1135-1141.
Andrew Grey, M.D., Mark Bolland, MBChC, Ph.D.: “Vitamin D: A Place in the Sun?” Archives of Internal Medicine, Vol. 170 (No. 13) July 12, 2010, page 1099.
