The role of vitamin D in the brain appeared evident in the 1980s when researchers found key proteins in the brain involved in vitamin D metabolism. A lot of clinical evidence has accumulated since then suggesting that low vitamin D levels may potentially result in cognitive decline. Nonetheless the results are mixed and not all previous studies have show that low levels of vitamin D are indeed associated with cognitive decline or dementia.
A 2010 study evaluated this question for the first time by following the same individuals over the years, instead of comparing people with normal levels and people with low-levels of vitamin D. This study followed 858 adults 65 years and older over 6‑years. Results showed an increased risk of cognitive decline in patients with vitamin D deficiency. [Read more…] about Vitamin D and Cognitive Decline: What’s the Relationship?