5. Fatigue and difficulty concentrating

Fatigue is a typical symptom that often occurs with vitamin or nutrient deficiencies. Vitamin D deficiency is no exception. In addition, the darkness and the melatonin released with it ensure that we are more tired and less able to concentrate.

6. Insomnia

In 2017, Iranian scientists examined the influence of vitamin D on sleep quality and found that regular intake of vitamin D can help you fall asleep better and stay asleep. The sleep duration of the test persons, who felt fitter and more productive during the day, also increased.

7. Bad blood sugar levels

An inadequate supply of vitamin D to our body can also affect blood sugar levels. In the case of vitamin D deficiency, this is in the fasted state (Fasting blood glucose) elevated. High blood sugar levels can promote inflammation and, in the long term, lead to insulin resistance and type 2 diabetes. A vitamin D deficiency can also be dangerous for diabetics, as this also affects the long-term blood sugar level (HbA1c) can be increased.

Multiple Sclerosis

It has not yet been conclusively clarified whether a vitamin D deficiency is the cause or a consequence of MS diseases. Nevertheless, the Danish research team led by Nete Munk Nielsen impressively demonstrated in 2017 that an inadequate Vitamin D Status of Newborns associated with an increased risk of developing MS later. To do this, they compared the blood values ​​of 521 newborns who had developed multiple sclerosis in adulthood and 972 comparison subjects who remained healthy. The results underscore the importance of optimal Vitamin D supply during pregnancy for the future child is.

9. Frequent colds

Dry heating air and circulating cold viruses make us susceptible to infections of the upper respiratory tract in winter. But according to the German Nutrition Society (DGE), a vitamin D deficiency also ensures that we catch colds more easily. The severity of the defect is also decisive: The greater the deficiency, the more susceptible we are to colds. Conversely, the DGE ascribes supplementation with vitamin D tablets to have a preventive effect against infections of the upper respiratory tract. However, vitamin D does not provide acute help against a cold that has already broken out.

Also interesting: How much vitamin D do I need a day? >>

10. Cravings

A vitamin D deficiency can actually trigger cravings, as our body notices that it is missing an essential vitamin or hormone. He signals the shortage to you via the cravings. So if you increasingly suffer from food cravings in the late winter months of February and March, you should have your trusted doctor checked your vitamin D level to be on the safe side.

11. Decreased fertility

In fact, an inadequate supply of vitamin D can also affect your fertility. This is what researchers from the University of Graz found out in a systematic review in 2012. The scientists found that both men and women who had low vitamin D levels, the production of Sexualhormonen was restricted. Likewise, she suffered Semen quality of the male subjects and the Pregnancy rate of the test persons under the deficiency. The researchers attribute this to the fact that vitamin D is involved in the production of testosterone and estrogen in the testes and ovaries, as well as in the formation of egg cells.

12. Muscle pain

In addition to muscle weakness and decreased performance in sport, muscle pain and aches and pains in the limbs can also occur when there is a lack of vitamins. It is also possible that you are more affected by sore muscles or exhaustion after intense exercise.

13. Headache

Like most nutrient deficiencies, vitamin D deficiency can cause headaches and even dizziness. Diffuse deficiency symptoms of this kind are relatively common, but do not, on their own, indicate a specific vitamin or mineral deficiency. Therefore, a visit to a doctor you trust is recommended if you are plagued by headaches over a long period of time. A blood test can then be used to determine whether and which deficiency is actually present.

Also interesting: 6 symptoms of iodine deficiency >>

Symptoms of vitamin D deficiency are rarer

  • Hair loss
  • nervousness
  • Poor eyesight
  • Nerve pain

How to prevent a vitamin D deficiency

There are a few things you can do to help prevent vitamin D deficiency. Eat a balanced, healthy diet and build up fatty fish, egg yolks, liver and Red meat in your menu. You can also get vitamin D through dairy products and certain edible mushrooms. Since most of it is absorbed by solar radiation, you should get yours Vitamin D memory recharge between March and October by going outside a lot. In winter this is not that easy, but even at this time you should be outside in the light for at least half an hour a day.

Tip: You should never take vitamin D supplements on your own, as there is a risk of overdosing or possibly no deficiency at all. However, if your doctor has already diagnosed you with a deficiency, you should always take vitamin D in combination with vitamin K2 take, as these act synergistically in the body, for example, in the build-up of bone substance, ie complement each other. Fortunately, many manufacturers take this into account, e.g. you can find appropriate supplements with vitamins D and K.2 here in capsule form or in drop form from around 20 euros.

Also helpful: The 5 foods with the highest vitamin D content >>


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