BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Niacin (vitamin B3) deficiency results in a condition known as pellagra. Pellagra includes the triad of dermatitis, dementia, and diarrhea and can result in death. In addition, niacin deficiency can occur through genetic disorders, malabsorptive conditions, and interaction with certain medications.

Detailed explanation-2: -Pellagra is a disease that occurs when a person does not get enough niacin (one of the B complex vitamins) or tryptophan (an amino acid).

Detailed explanation-3: -A severe niacin deficiency leads to pellagra, a condition that causes a dark, sometimes scaly rash to develop on skin areas exposed to sunlight; bright redness of the tongue; and constipation/diarrhea.

Detailed explanation-4: -Pellagra is defined by the systemic disease resulting from niacin deficiency, and it is characterized by diarrhea, dermatitis, dementia, and death, which usually appear in this order. GI tract symptoms always precede dermatitis, or, according to Rille, “Pellagra begins in the stomach".