An international team led by Dr. David Llewelling of the Exeter Medical School found that older people with lower vitamin D levels have more than twice the risk of developing Alzheimer's disease. This is the first one found, the relationship between vitamin D and Alzheimer's disease.
The research team studied 1,658 Americans aged 65 and over who were able to walk independently without Alzheimer's disease, cardiovascular disease, and stroke. Six years later, the researchers again investigated the status of these elderly people. It was found that Alzheimer's disease is related to vitamin D levels. The results of the study showed that when the vitamin D content in blood is less than 50 nanomoles per liter, the risk of illness begins to increase.
Dr. Llewellyn said: "We hope to find a link between low vitamin D levels and Alzheimer's disease, but the results are surprising and the results are twice our expectations. We need to be cautious about this research." Most of the body's vitamins D comes from the conversion of sunlight, but elderly people have lower conversion efficiency. Vitamin D can be supplemented by eating fish oil and milk. Researchers will further study whether it is possible to prevent or delay Alzheimer's disease or improve memory by supplementing vitamin D. This requires large-scale clinical trials.
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