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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)
Although synthetic vitamin A supplementation is a useful and effective treatment for VAD, a 2017 review (updated in 2022) reported that synthetic vitamin A supplementation may not be the best long‐term solution for vitamin A deficiency, but rather food fortification, improved food distribution programs, and crop improvement, such as for ...
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.
Vitamin deficiencies can cause a wide range of health problems, like night blindness (vitamin A deficiency), fatigue (vitamin B deficiencies), swollen gums (vitamin C deficiency), weak bones ...
Keratomalacia is an eye disorder that results from vitamin A deficiency. Vitamin A is required to maintain specialized epithelia (such as in the cornea and conjunctiva ). The precise mechanism is still not known, but vitamin A is necessary for the maintenance of the specialized epithelial surfaces of the body.
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 ]
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.
Vitamin B12 deficiency symptoms . Vitamin B12 deficiency has a few hallmark symptoms, according to doctors: Lack of energy. Mental fatigue. Nausea, vomiting, or diarrhea. Lack of appetite. Weight loss