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Causes of Vitamin D deficiency

Vitamin D: Origin and properties
Vit D is an essential element for the proper functioning within the body.

From the Vitamin D

Vitamin D has two origins:


  • Nearly 90% of vitamin D is synthesized by the skin.
  • Vitamin D is synthesized by the body primarily through the action of sunlight upon the skin.
  • 10 to 15 minutes of sun exposure to synthesize sufficient properly Vitamin D;
  • The synthesis of pro-vitamin D3 occurs in the deeper layers under the skin under the effect of UVB from 7-dehydrocholesterol,
  • This is then transformed into calcidiol in the liver in an inactive form and calcitriol in the kidney,

The power

Vitamin D is found in fatty fish, herring, cod-liver oil, salmon, sardines, liver heifer and lamb, bacon, ham, egg yolk, products milk, margarine and butter, but also in chanterelles.

The role of Vitamin D

  • Vitamin D promotes the absorption and fixation of calcium on bone.
  • Vitamin D increases the possibilities of the body to absorb calcium from food.
  • It promotes the growth as the child.
  • It prevents osteoporosis in women and the elderly.
  • It prevents the development of certain cancers (breast, prostate, colorectal)

Vitamin D deficiency: Risk Factors and events
Numerous studies have shown that more than 50 years would be the most deficient vitamin D.

Those affected by Vitamin D deficiency.

  • Pregnant women
  • Older people
  • People with low weight
  • People with dark skin or black
  • Pregnant women breastfeeding their babies and not receiving VIT D supplementation
  • People living in high-latitude countries where there is lower UVB.
  • Exposure conditions, clothing, pigmentation, use of sunscreen, latitude, Air conditioner (pollution), influence the synthesis of VIT D.

Manifestations of deficiency IT V D

A vitamin D deficiency causes bone loss causing abnormal bone development and increased fragility at the origin of rickets and fractures.

Pain and muscle weakness can result in falls between the elderly.

VIT D deficiency can cause fatigue.

An increased risk of death

  • A survey in the journal Archives of Internal Medicine by American doctors shows that vitamin D deficiency increase by 26% the risk of death among men and women.
  • Maryland researchers gathered data from a national health survey on 13,000 people. In people who had low levels of vitamin D, the mortality risk was 26% higher.
  • This study also found a link between vitamin D deficiency and breast cancer and depression in the elderly.

Breast cancer
A study by the German Research Center against Cancer (DKFZ) in 2008 showed that women with low levels of vitamin D in the blood have a higher risk of developing breast cancer.

MS, diabetes, respiratory infections
The administration of vitamin D:

  • appear to reduce the risk of multiple sclerosis (MS)
  • made in childhood reduce the risk of contracting diabetes type, I,
  • reduce the incidence of respiratory infections.

The causes of VIT D deficiency are many.
Focus on the most common causes.
Insufficient sunshine

A lack of sunlight can occur in winter, or people do not sufficiently exposing such as the elderly, those with disabilities, people with medical conditions preventing them out ...
A poor diet

The absence of meat, fish, dairy products into the diet resulting in an inadequate intake of VIT D: vegans and people undernourished live in developing countries.

Digestive pathologies

  • Malabsorption intestinal
  • Hepatic
  • Pancreatic damage

Other diseases

  • Cancer
  • Osteoporosis
  • Chronic renal failure
  • Hypothyroidism
  • Chronic alcoholism
  • Obesity .. Non-exhaustive list

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