Two studies that were conducted at the French National Institute of Health and Medical Research (Inserm), Bordeaux Population Health (Bordeaux University) show that vitamin D deficiency can contribute to increasing the risk of developing Alzheimer’s disease, especially if the person also doesn’t have a storage of “good fats” and antioxidant carotenoids.
The studies led by Inserm researchers Catherine Feart and Cecilia Samieri involved around 10,000 people aged 65 and above who were in good health or at least not suffering from Alzheimer’s disease. The research began in 2000.
The study participants were seen by psychologists for 17 years wherein they underwent a battery of tests to determine if they succumbed to a form of dementia, including Alzheimer’s. Feart and Samieri used biobank samples of the study participants to look for particular nutrient concentrations: fatty acids, carotenoids, and vitamins A, D, and E.