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A man with pellagra, which is caused by a chronic lack of vitamin B 3 in the diet. Severe deficiency of niacin in the diet causes the disease pellagra, characterized by diarrhea, sun-sensitive dermatitis involving hyperpigmentation and thickening of the skin (see image), inflammation of the mouth and tongue, delirium, dementia, and if left untreated, death. [7]
Chronic alcoholism can also cause poor absorption, which combined with a diet already low in niacin and tryptophan produces pellagra. [10] Hartnup disease is a genetic disorder that reduces tryptophan absorption, leading to pellagra. Alterations in protein metabolism may also produce pellagra-like symptoms.
Flushing of skin (associated with niacin (vitamin B3) overdose) Skin disturbances (e.g. dryness, itching, cracking of skin, rashes, increased sensitivity to sun) Changes of hair texture (e.g. thickening and/or clumping of hair) Appetite loss; Constipation (associated with iron or calcium overdose) Nausea and vomiting; Diarrhoea
Genital herpes causes clusters of red, blistery bumps on the vulva, which come and go as outbreaks. You may experience itching in the areas the sores appear in even before they show up. Chlamydia ...
Niacin has been linked to a higher risk of heart disease. It is often added to flour and fortified cereals in the U.S. The B vitamin used to be a popular medication to lower high cholesterol.
When you buy a bottle of vitamins from a nutrition store, you’ll probably notice a best-by date on the bottom of the jar. But that inscribed number isn’t a hard-and-fast rule—there is some ...
Nicotinamide (INN, BAN UK [2]) or niacinamide (USAN US) is a form of vitamin B 3 found in food and used as a dietary supplement and medication. [3] [4] [5] As a supplement, it is used orally (swallowed by mouth) to prevent and treat pellagra (niacin deficiency). [4]
However, it can occur on the scalp, and this will often cause itching. “If some pustules form and they are scratched they will also form a scab,” Dr. Thosani says. “Most often scalp acne is ...