A 2012 study showed supplemental vitamin C helped patients with nervous system problems and abnormal sleep patterns achieve more normal sleep. The effect was only achieved within a narrow range of vitamin D blood levels (60-80 nanograms/milliliter). Given that sleep cycles are governed by day/night periods and vitamin D is known as the “sunshine” vitamin, it is not surprising that vitamin D deficiency perturbs sleep.
A current update on this topic is very intriguing. Curious readers may want to listen to meurological researcher Stasha Gominak MD talk about vitamin D deficiency and sleeplessness, especially sleep deprived individuals who C-PAP masks. [DrGominak.com] Dr. Gominak claims sleep apnea is a disorder of epidemic proportion in developed countries. The symptoms of vitamin D deficiency are the same symptoms for sleep apnea.
Dr. Gominak links a prolonged vitamin D deficiency with an altered intestinal environment. B vitamins are normally produced by a healthy microbiome in the intestines. Supplemental vitamin D + B vitamins often normalize sleep.