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Vitamin A deficiency (VAD) or hypovitaminosis A is a lack of vitamin A in blood and tissues. [1] It is common in poorer countries, especially among children and women of reproductive age, but is rarely seen in more developed countries. [ 1 ]
Only when the liver stores are nearly depleted will signs and symptoms of deficiency show. [4] Retinol is reversibly converted to retinal, then irreversibly to retinoic acid, which activates hundreds of genes. [9] Vitamin A deficiency is common in developing countries, especially in Sub-Saharan Africa and Southeast Asia. Deficiency can occur at ...
A major cause of Bitot's spots is vitamin A deficiency (VAD). [4] Rarely, pellagra due to deficiency of vitamin B 3 (niacin) may also cause Bitot's spots. [5] They can also be caused by Colestyramine , which is a bile acid sequestrant which can reduce the absorption of fat soluble vitamins (Vitamins A, D, E, K)
Certain vitamin and minerals deficiencies are common in people with porphyria cutanea tarda. The most common deficiencies are beta-Carotene, [7] retinol, [8] vitamin A [9] and vitamin C. Beta-Carotene is required to synthesize vitamin A and vitamin A is needed to synthesize retinol.
“As the deficiency worsens, more serious symptoms appear, such as swollen and bleeding gums, joint pain, easy bruising, dry skin and poor wound healing.” In severe cases, scurvy can lead to ...
Signs of a vitamin D deficiency. Infants and children with severe vitamin D deficiency are at risk for a condition called Rickets, says Prest. “This is where the arms and legs can become bowed ...
Skin changes in Darier's disease are related to a type of nutritional vitamin A deficiency that is caused by genetic mutations. The skin displays follicular dyskeratosis (degeneration of the skin in hair follicules), which reflects as hypovitaminosis A (systemic Vitamin A deficiency). [15]
What Are Symptoms of Vitamin B12 Deficiency? ... This causes fatigue, paleness in the skin, nerve problems, and memory loss. Pernicious anemia, or Addison's anemia, is an autoimmune disease which ...
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