Could vitamin d deficiency contribute to my sleep problems?

Possibly. Vitamin d effects most, if not all the organs in the body including the brain. The problems with deficiency are not always the same in everyone. Regardless, if you are deficient, you would benefit from supplements to raise your blood level to at least 40-60 ng/dl according to the latest endocrine society guidelines.
Vit. D Deficiency. Deficiency can result in bone pain, weakness, muscle cramps, any of which can interfere with sleep.

Related Questions

Is vitamin D deficiency linked to bad sleep?

Vitamin D deficiency. If you shun the sun, suffer from milk allergies, or have a strict vegan diet, you may have vitamin D deficiency. In older adults it may lead to cognitive impairment, but am unaware that it produces sleep disturbances. Serotonin, the brain hormone associated with mood elevation, rises with exposure to bright light and falls with decreased sun exposure and this has been associated with depression.
Possibly. In our brain, there are vitamin D receptors that control our biological clocks, biorhythms & master clock too affecting all organs in the body. So there's implication that different neurotransmitters are also Vitamin D3 dependent, including melatonin. Insomnia can have over 20 different reasons why it occurs, not just a single vitamin/hormone deficiency. Ask your Doctor for her/his recommendations.

Which sort of medical problems arise as a result of vitamin d deficiency?

Bone density. Vitamin d can be ingested (in milk or supplements) and can also be created in your skin via sun exposure. The latter is becoming less common as most of us use sunscreen! Vit d plays a vital role in bone development and woman are at increased risk for osteoporosis. Got milk? Increase milk intake, use supplements as necessary, and increase weight bearing exercise to build bone!

What problems have to do with vitamin d deficiency other than rickets, osteoporosis and osteomalacia?

Malabsorption. Certain malabsorption syndromes can lead to this. Also certain areas in the world who lack essential vitamins. Also people who do not eat a healthy diet. All adults should take 1000 international units of vitamin d daily. Hope this answers your question.

I've vitamin D deficiency 17.5nmol/l and iron deficiency 6.8umol/l there is any problem if I take vitamin D and iron together?

No problem. Taking both vitamin D and iron together should not be a problem. Your stomach may be sensitive to one of these drugs so if you have any symptoms such as nausea or pain you should try taking them at different times.