What is the general name for the deficiency disorder characterized by the three D's: dementia, dermatitis, and diarrhea?

The deficiency disorder characterized by the three D's—dementia, dermatitis, and diarrhea—is known as Pellagra. This condition is specifically caused by a deficiency of niacin (vitamin B3) or tryptophan, which the body can convert into niacin. The symptoms mentioned are classic indicators of Pellagra, making it critical for understanding the role of niacin in maintaining health.

Dementia refers to cognitive decline, which can significantly affect daily functioning. Dermatitis presents as a skin rash, typically in sun-exposed areas, while diarrhea offers insight into the digestive system's response to the lack of sufficient niacin. The acronym "the three D's" is commonly used in nutritional studies and serves as a mnemonic to recall the key symptoms associated with Pellagra. Understanding these symptoms is vital for identifying and addressing nutritional deficiencies in patients.