Recalls & Warnings (20)

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Clinical Updates (17)

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3/29/2017

Vitamin E/Selenium & Alzheimer's

A long-term study among men in the U.S. found that giving high doses of vitamin E and/or selenium did not significantly affect their risk of developing dementia. The study was part of a larger study which found that these supplements increased the risk of prostate cancer, type 2 diabetes, hair loss, and dermatitis. For details, see the "Alzheimer's disease/dementia" section of the Selenium Supplements Review >>
8/20/2016

Calcium Supplements & Risk of Dementia

Taking calcium supplements is associated with an increased risk of dementia in certain elderly women, according to a new study. Get the details in the "Cautions and Concerns” section of the Calcium Supplements Review >>
8/27/2017

Does Lithium Prevent Dementia?

A new study found the risk of developing dementia to be significantly lower in areas with higher levels of lithium in the drinking water. This finding is consistent with a study that found low-dose lithium to stabilize patients with Alzheimer’s disease. Details about these studies are in the "What It Does" section of the Low-Dose Supplements Review, which includes our Top Picks among low-dose lithium supplements.
9/23/2017

Magnesium and Dementia

A recent study found an association between magnesium levels in the blood and the risk of developing dementia. See the details in the "What It Does" section of the Magnesium Supplements Review >>
11/19/2019

Magnesium for Memory

There is growing evidence that getting the right amount of magnesium reduces the risk of developing cognitive decline and dementia. For details, including results of a new study, see the Dementia and cognition section of the Magnesium Supplements Review. Also see our Top Pick among magnesium supplements.
5/26/2020

Lower Risk of Dementia Through Foods

A 20-year study showed that the risk of Alzheimer's disease and other forms of dementia was 76% lower in people who ate more of certain foods. Find out what they ate and learn if supplements can help in our answer to the question: Do any supplements really help with brain function, like memory and cognition?
10/14/2017

Reducing Dementia With Magnesium?

In a recently published study, investigators looked to see if taking a magnesium supplement reduces the risk of dementia. See what they found in the "What It Does" section of the Magnesium Supplements Review >>
6/27/2020

Factors For Lower Risk of Dementia

Diet and lifestyle factors were associated with up to 60% reductions in the risk of developing Alzheimer dementia according to a new study. Learn about these lifestyle factors in the updated answer to the question: Do any supplements really help with brain function, like memory and cognition?
9/16/2015

Adequate Vitamin D May Lower Risk of Alzheimer's

A study showed that men and women with adequate levels of vitamin D in their blood were less likely to experience declines in cognitive functioning associated with Alzheimer’s dementia than those with lower levels. More about the study, including the vitamin D level considered adequate, as well as our reviews of supplements, is found in the Vitamin D Supplements Review >>
11/23/2019

Magnesium-L-Threonate for Memory?

What is the evidence that a special form of magnesium helps people with memory and concentration impairment? Find out in the Dementia and cognition section of the Magnesium Supplements Review. Also see our Top Picks among magnesium supplements.
5/26/2018

Do We Really Need More Lithium?

Studies have shown higher rates of mental illness and dementia in areas with the lowest levels of lithium in the water, suggesting that people supplement with lithium. However, a new study raises doubts about this. For details, see the What It Does section of the Low-Dose Lithium Supplements Review.
11/27/2018

Can Vitamin D Boost Cognition?

Middle-aged people with low levels of vitamin D were given high-dose vitamin D for four months. Find out if this boosted their cognitive performance in the Alzheimer's disease, dementia, memory and cognitive decline section of the Vitamin D Supplements Review. (Also see our Top Picks for vitamin D.)
4/08/2017

Omega-3s for Age-Related Cognitive Decline?

A recent study found DHA and EPA from fish oil did not slow cogntive decline in older adults with cognitive difficulties. However, other studies suggest there may be a benefit if taken before the onset of cognitive decline or dementia. For details, see the "Age-Related Cognitive Decline" section of the Fish Oil and Omega-3 Fatty Acid Supplements Review >>
6/18/2016

Green Tea & Cognition

Green tea consumption has been associated with a lower prevalence of cognitive impairment in older adults. However, a recent study evaluating the effects of a green tea powder on older adults with Alzheimer’s disease and other forms of dementia failed to show a benefit. For more information, see the "What It Does" section of the Green Tea Review >>
10/04/2011

Fish Oil's Impact on Cognitive Decline

Cognitive decline may be a normal part of aging, but a new study suggests that high-dose fish oil particularly rich in DHA may provide some benefit. In people over age 65 with mild cognitive impairment, fish oil was associated with improved verbal skill. Perhaps as important, fish oil also reduced depressive symptoms, which can be a risk factor in the progression to dementia. Get the details, including how much DHA and EPA was used in the study, in the Fish Oil and Omega-3 Fatty Acid Supplement ReviewMore >>
9/09/2012

Ginkgo Fails Alzheimer's Trial

Over two thousand people with memory complaints were given Ginkgo biloba extract or placebo as part of a five-year study. The results, published this week, showed no difference between the groups in the percentage who eventually developed Alzheimer's disease or dementia. See how this compares to other studies of ginkgo in the updated Ginkgo Biloba Supplements Review, which includes our tests and reviews of ginkgo products. More >>
8/08/2014

Up To a Point, Alzheimer's Risk Falls with Vitamin D

A new study shows that, up to a point, the risks of developing Alzheimer’s disease and other forms of dementia fall with higher blood levels of vitamin D. However, the research also clarifies that exceeding a certain blood level of vitamin D provides no further benefit. In fact, additional research suggests that too much vitamin D can have negative effects. The message: Make sure you have a sufficient, but not excessive level of vitamin D. For details about these levels, as well as results of our tests of vitamin D supplements, see the updated Vitamin D Supplements Review >>