Niacin Flashcards
What are good sources of Niacin?
beets, fish, salmon, swordfish, tuna, peanuts, sunflower seeds and beef liver or kidney. NB: In addition to dietary sources, NAD can be synthesized from the essential amino acid tryptophan.
What are the different forms of Niacin? What two enzymes do they serve?
The two different forms or niacin are nicotinic acid and nicotinamide. Nicotinamide serves as a component to coenzymes NAD and NADP.
Which part of the GI tract is niacin absorbed?
Both nicotinic acid and nicotinamide are absorbed rapidly and efficiently in the stomach and intestine by active transport at low concentrations or passive at high concentrations.
What is the main roles of niacin?
Like coenzymes for riboflavin, the coenzymes for niacin (NAD/NADP) are involved in the electron transport chain. Therefore, niacin functions in the metabolism of CHO, PRO and FATS. In addition, it functions in the repair of DNA, in Ca mobilization, in activation of folate, and in the reduction of some antioxidants
what is niacin deficiency?
Niacin deficiency is pellagra. Main symptoms are the 3 Ds: dermatitis, diarrhea, and dementia.
