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:
Skin
- 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
Bones
A vitamin D deficiency causes bone loss causing abnormal bone development and increased fragility at the origin of rickets and fractures.
Muscles
Pain and muscle weakness can result in falls between the elderly.
Fatigue
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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