The effect is real, but with a chain of causation that requires other factors. The abnormal oxidative stress and mitochondrial dysfunction noted in Alzheimer’s Disease and other neurodegenerative disorders can best be explained as the result of a combined Vitamin D and magnesium deficiency. In such a state, more light at night means less recuperative sleep, extra mental activity, and more oxidative stress, compounded by impaired enzyme processes in brain cells due to inadequate magnesium.