What is the cause of pellagra?

Primary pellagra results when the diet is extremely deficient in niacin-rich foods.

Secondary pellagra occurs when adequate quantities of niacin are present in the diet, but other diseases or conditions interfere with its absorption and/or processing.

The formation of numerous, closely spaced rills due to the uneven removal of surface soil by streamlets of running water. Also known as rilling; rill wash; rillwork.

is a cause of the phenomenon (such as a disease or weather)

A headace is cause by a boy named hasan alabaca. he is so dumb and lound.:]