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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, whereas when due to an underlying disorder such as malabsorption it is called a secondary deficiency. An underlying disorder can have 2 main causes:
Its deficiency can cause neurodevelopmental problems which can be partly reversible with early treatment. [27] Only a small subset of dementia cases have been found to be reversible with vitamin B 12 therapy. [28] Tinnitus may be associated with vitamin B 12 deficiency. [29] Vitamin B 12 deficiency may accompany certain eating disorders or ...
Megaloblastic anemia, the most common cause of macrocytic anemia, is due to a deficiency of either vitamin B 12, folic acid, or both. [79] Deficiency in folate or vitamin B 12 can be due either to inadequate intake or insufficient absorption. Folate deficiency normally does not produce neurological symptoms, while B 12 deficiency does.
Folate deficiency, also known as vitamin B 9 deficiency, is a low level of folate and derivatives in the body. [1] This may result in megaloblastic anemia in which red blood cells become abnormally large, and folate deficiency anemia is the term given for this medical condition. [3] Signs of folate deficiency are often subtle. [4]
Vitamin D deficiency is typically diagnosed by measuring the concentration of the 25-hydroxyvitamin D in the blood, which is the most accurate measure of stores of vitamin D in the body. [ 1 ] [ 7 ] [ 2 ] One nanogram per millilitre ( 1 ng/mL ) is equivalent to 2.5 nanomoles per litre ( 2.5 nmol/L ).
Vitamin D deficiency, especially in early life, is linked to an increased risk of autoimmune conditions, such as type 1 diabetes. Autoimmune diseases can be caused by a failure of T cells, a type ...
The most common cause of rickets is a vitamin D deficiency, although hereditary genetic forms also exist. [2] This can result from eating a diet without enough vitamin D , dark skin, too little sun exposure, exclusive breastfeeding without vitamin D supplementation, celiac disease , and certain genetic conditions .
In plants a micronutrient deficiency (or trace mineral deficiency) is a physiological plant disorder which occurs when a micronutrient is deficient in the soil in which a plant grows. Micronutrients are distinguished from macronutrients ( nitrogen , phosphorus , sulfur , potassium , calcium and magnesium ) by the relatively low quantities ...