Vitamin A deficiency (VAD) or hypovitaminosis A is a lack of vitamin A in blood and tissues. It is common in poorer countries, especially among children...

Vitamin deficiency is the condition of a long-term lack of a vitamin. When caused by not enough vitamin intake it is classified as a primary deficiency...

Vitamin B12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin...

Vitamin D deficiency or hypovitaminosis D is a vitamin D level that is below normal. It most commonly occurs in people when they have inadequate exposure...

shortfall, deficiency can be the result of anti-vitamin drugs. There are also rare genetic defects that can trigger vitamin B6 deficiency-dependent epileptic...

migraine headaches in adults. Riboflavin deficiency is rare and is usually accompanied by deficiencies of other vitamins and nutrients. It may be prevented...

supplements. Only some archaea and bacteria can synthesize vitamin B12. Vitamin B12 deficiency is a widespread condition that is particularly prevalent in...

Vitamin K deficiency results from insufficient dietary vitamin K1 or vitamin K2 or both. Symptoms include bruising, petechiae, and haematoma. Vitamin...

Vitamin E deficiency in humans is a very rare condition, occurring as a consequence of abnormalities in dietary fat absorption or metabolism rather than...

blood. Several named vitamin deficiency diseases may result from the lack of sufficient B vitamins. Deficiencies of other B vitamins result in symptoms...

Pernicious anemia is a disease where not enough red blood cells are produced due to a deficiency of vitamin B12. Those affected often have a gradual onset....

include fish, dairy products, and meat. As a supplement it is used to treat and prevent vitamin A deficiency, especially that which results in xerophthalmia...

inflammation. Vitamin D has a significant role in calcium homeostasis and metabolism. Its discovery was due to effort to identify the dietary deficiency in children...

Vitamin K deficiency bleeding (VKDB) of the newborn, previously known as haemorrhagic disease of the newborn, is a rare form of bleeding disorder that...

Folate deficiency, also known as vitamin B9 deficiency, is a low level of folate and derivatives in the body. This may result in megaloblastic anemia...

were vitamin deficiency diseases. Then, starting in 1935, commercially produced tablets of yeast-extract vitamin B complex and semi-synthetic vitamin C became...

thiamin and vitamin B1, is a vitamin, an essential micronutrient for humans and animals. It is found in food and commercially synthesized to be a dietary...

Scurvy is a disease resulting from a lack of vitamin C (ascorbic acid). Early symptoms of deficiency include weakness, fatigue, and sore arms and legs...

reprocessed into vitamin K through a vitamin K oxide intermediate. The presence of uncarboxylated proteins indicates a vitamin K deficiency. Carboxylation...

vitamin A deficiency (VAD). Estimates show that around 1.02 billion people are severely affected by micronutrient deficiencies globally, with vitamin...

at least 30% of children were still affected by stunting in 2022. Vitamin A deficiency affects one third of children under age 5 around the world, leading...

Vitamin A is a fat-soluble vitamin that is an essential nutrient. The term "vitamin A" encompasses a group of chemically related organic compounds that...

Copper deficiency can manifest in parallel with vitamin B12 and other nutritional deficiencies. The most common cause of copper deficiency is a remote...

therapy, it is used to prevent and treat scurvy, a disease caused by vitamin C deficiency. Vitamin C is an essential nutrient involved in the repair...

infants, are at risk for choline deficiency. Beef liver, wheat germ, and egg yolks are common foods providing choline. B vitamins, also known as the B-complex...

develop according to several mechanisms, classically as a result of niacin (vitamin B3) deficiency, which results in decreased nicotinamide adenine dinucleotide...

Causes of decreased production include iron deficiency, folate deficiency, vitamin B12 deficiency, thalassemia and a number of bone marrow tumors. Causes of...

which iodine deficiency disorders were a public health concern reduced by more than half from 110 to 47 countries. Vitamin A deficiency is a major factor...

underlying problem with digesting dietary fat rather than from a diet low in vitamin E. Deficiency can cause neurological disorders. Tocopherols and tocotrienols...

also causes. Vitamin A deficiency is most common in developing countries where many kids experience malnourishment. This vitamin deficiency blinds hundreds...