Vitamin B3 Niacin Deficiency (Pellagra) | Sources, Causes, Symptoms, Diagnosis, Treatment

The video tutorial covers vitamin B3 (niacin), its functions, sources, and importance in nutrient metabolism. It explains the roles of NAD and NADP in energy production and other cellular processes. The tutorial discusses how vitamin B3 is absorbed and excreted, and identifies causes of deficiency, including poor diet, liver disease, and certain medications. It describes the clinical features of pellagra, a condition caused by niacin deficiency, and outlines its evaluation and treatment through niacin supplementation.

What is another name for Vitamin B3?

• Ascorbic acid

• Thiamine

• Nicotinic acid

• Riboflavin

Which of the following is NOT a source of Vitamin B3?

• Fortified cereals

• Fish

• Dairy

• Meat

What is the role of NAD in the body?

• Carrier of chemical energy

• Hormone regulation

• Protein synthesis

• Cell membrane formation

Which pathway involves NADP?

• Glycolysis

• Krebs cycle

• Beta-oxidation

• Pentose phosphate pathway

Where is Vitamin B3 primarily absorbed in the body?

• Small intestine

• Large intestine

• Stomach

• Liver

Which condition is NOT a cause of Vitamin B3 deficiency?

• Vegan diet

• Chronic alcoholism

• Excessive protein intake

• Liver disease

Which medication is most commonly associated with causing Vitamin B3 deficiency?

• Ibuprofen

• Isoniazid

• Metformin

• Aspirin

What is the mnemonic used to remember the clinical features of pellagra?

• 6 F's

• 5 E's

• 4 D's

• 3 C's

Which symptom is NOT associated with pellagra?

• Diabetes

• Dementia

• Dermatitis

• Diarrhea

How is pellagra treated?

• Chemotherapy

• Antibiotics

• Surgery

• Niacin supplementation