Vitamin D, a vital nutrient for maintaining strong bones, may also affect memory and brain function in older adults.
A recent study from Rutgers University found that while vitamin D can enhance memory performance, taking too much might slow reaction times, potentially increasing the risk of falls and fractures.
Vitamin D is naturally obtained through sunlight exposure and can also be taken as a supplement. It’s essential for supporting the body’s overall health and is particularly known for its role in maintaining bone density.
In addition, previous research has suggested that vitamin D plays a role in brain function, including cognition and memory.
In this new study, researchers explored how different doses of vitamin D supplements affected memory and reaction times. The study involved overweight and obese women aged 50 to 70, divided into three groups.
Each group took a different daily dose of vitamin D for one year: 600 international units (IU), the recommended daily amount; 2,000 IU; and 4,000 IU. All participants were also encouraged to lose weight as part of the study.
The findings showed that women taking 2,000 IU of vitamin D daily experienced improvements in memory and learning. However, their reaction times tended to slow slightly. In women taking 4,000 IU per day, the slowing of reaction times was even more pronounced.
Slower reaction times are a concern because they can affect balance and coordination, increasing the likelihood of falls and related injuries.
Previous studies have also linked high doses of vitamin D (2,000 IU or more per day) with a greater risk of falls, highlighting the potential dangers of excessive supplementation.
The researchers suggest that taking 4,000 IU daily may disrupt walking or balance, particularly in older adults.
The study emphasizes the need for further research to determine how reaction time is related to fall risks and injuries in people who are more vulnerable, such as older adults.
Additionally, the researchers recommend investigating how different doses of vitamin D might affect men and women differently, as the current study only involved women.
These findings underscore the importance of balancing vitamin D intake. While sufficient levels are crucial for both bone and brain health, excessive supplementation may have unintended negative effects, particularly for older adults.
For those interested in maintaining brain health, other studies suggest that a Mediterranean diet may help protect the brain, and vitamin B supplements could lower the risk of dementia.
High-fiber diets and certain antioxidants have also been shown to reduce dementia risk, further highlighting the importance of a balanced and nutritious diet.
This research, conducted by Sue Shapses and her team, was published in The Journals of Gerontology: Series A and adds to the growing understanding of how vitamin D supplementation impacts both physical and cognitive health.
If you care about brain health, please read studies about how the Mediterranean diet could protect your brain health, and blueberry supplements may prevent cognitive decline.
For more information about brain health, please see recent studies about antioxidants that could help reduce dementia risk, and Coconut oil could help improve cognitive function in Alzheimer’s.
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