vitamin D(redirected from 25-dihydroxy)
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vitamin DA mixture of several forms of vitamin D: Vitamin D3 is synthesised in the skin upon exposure to ultraviolet light; in contrast, vitamin D2 is obtained only from the diet. Both vitamins D2 and D3 are metabolised to 25-hydroxy vitamin D in the liver, and then to the active 1,25 dihydroxy form in the kidney. Vitamin D has a major role in the intestinal absorption of calcium, bone calcium balance and renal excretion of calcium, and is measured as part of a workup for hypocalcaemia, hypercalcaemia and hypophosphataemia.
Infants given excess vitamin D may develop atherosclerosis, severe mental retardation, facial dysmorphia, kidney damage, recurrent infections, anorexia, failure to thrive, and may die; as with adults ingesting megadoses of vitramin D, the damage is caused by excess calcium absorption.
vitamin Da fat-soluble molecule found in fish liver oils, and also produced in the skin when subjected to ultraviolet rays from sunlight. The main function of the vitamin is to increase the utilization of calcium and phosphorus in bones and teeth. A deficiency results in RICKETS in children and osteomalacia (bone-softening) in adults, particularly women after several pregnancies.
Patient discussion about vitamin D
Q. Recently I came to know after a test that I am vitamin D deficient so how much vitamin D should I take? I am 26 yrs old and I have fibromyalgia. Recently I came to know after a test that I am vitamin D deficient so how much vitamin D should I take?
Q. Should I give my baby girl vitamin D? I have a 4 month old baby girl. I have been reading that it is advised to give babies vitamin D. Is this true?
Babies need vitamin D for healthy growth and development. It helps them build strong, healthy bones and teeth.
Babies who don’t get enough vitamin D are at risk of getting rickets, a disease that affects the way bones grow and develop. Vitamin D can also help prevent certain illnesses in childhood or later in life.
Q. What food are rich with vitamin D? My son is 4 years old and the Doctor said he has vitamin D deficiency and advised me to give him a vitamin D supplement. I don't like the idea of giving him medicine, can't I just give him food which is rich with vitamin D and if so which foods are rich with vitamin D?