In this study the researchers examined structural MRI data and vitamin D levels in 1,865 people from the general population (Terock J, et.al., 2022).
They investigated whether low vitamin D levels were associated with imaging patterns of brain aging, gray matter volumes, whole brain volumes and hippocampus volumes.
Vitamin D deficiency was significantly associated with increased brain age. They found that vitamin D levels were significantly associated with total brain and gray matter volumes.
The researchers suggested that vitamin D has neuroprotective effects on the brain.
This should be easy. Just have your vitamin D levels tested and take enough vitamin D to prevent deficiencies. Ideally you should have vitamin D levels between 50-60 ng/ml.
Jan Terock, Sarah Bonk, Stefan Frenzel, Katharina Wittfeld, Linda Garvert, Norbert Hosten, Matthias Nauck, Henry Völzke, Sandra Van der Auwera, Hans Joergen Grabe, Vitamin D deficit is associated with accelerated brain aging in the general population, Psychiatry Res Neuroimaging. 2022 Oct 19;327:111558.