Yes. I reference some of those in my post. It didn’t matter at this level. After I read Seth Robert’s posts on the topic, I made sure I took Vit D in the morning. I was taking it in the morning for several months before I totally quit.
Dr Gominak, among others, recommends a blood vitamin D3 level of 60-80 ng/ml. Dr. Gominak’s position is that lower or higher levels may cause abnormal sleep. It is therefore important to have blood levels checked regularly when taking Vitamin D supplements. http://drgominak.com/vitamin-d-3/
Vitamin D receptors, as well as the enzymes that control their activation and degradation, are found in various brain regions that regulate sleep. Vitamin D is also involved in the creation of Melatonin, a hormone that controls human circadian cycles and sleeps patterns. Learn More.
basically i noticed something similar. Whenever I don’t take my Vitamin D supplement for a week, my sleep patterns worsen. (+ if i take days off in a sunny place, i sleep much better)