describe the digestion and absorption of vitamin b3

Solutions

Expert Solution

Vitamin B3(Niacin) is a water soluble vitamin. Niacin is naturally present in many foods, both animal based(beef, fish) and plant based ( nuts, legumes, grains) and as a dietary supplement. Niacin is absorbed in the body by small intestine and some of it by the stomach. The tissues in the body convert absorbed niacin into its metabolic active form,the coenzyme nicotinamide adenine dinucleotide(NAD). The NAD is converted into NADP(nicotinamide adenine dinucleotide phosphate) in most of the tissues.
Both NAD and NADP are required in the metabolic processes in the cells. they are primarily involved in reactions that transfers the potential energy in carbohydrates, fats, to ATP. NAD is also responsible for cellular functions such as genome integrity, control of gene expression etc.
Niacin is mostly absorbed by the body even if taken in high doses and later metabolized to NAD. The excessive niacin or unmetabolized nicotinic acid may be present in urine.

gladiator answered 8 months ago

Next > < Previous

Related Solutions

Lipid digestion and absorption is particularly challenging. Describe lipid digestion, absorption, and the mechanisms by which...

Lipid digestion and absorption is particularly challenging. Describe lipid digestion, absorption, and the mechanisms by which lipids are transported in the blood. Why are lipids so challenging to manage in digestion?

protein Digestion and absorption

Starting with the actions in the mouth describe the digestion, absorption, and elimination of a meal...

Starting with the actions in the mouth describe the digestion, absorption, and elimination of a meal containing carbohydrates, lipids, and proteins (include mechanical and chemical digestion in each of the structures of the GI tract, the enzymes, movement of the material through the digestive tract, the roles of the accessory structures in digestion, and changes in pH).

describe the following process of the digestive system, the digestion and absorption of amino acids

Describe the role lipid digestion, absorption, and transport through the blood relating these topics to the...

Describe the role lipid digestion, absorption, and transport through the blood relating these topics to the concepts of polarity and solubility in polar solutions such as water and blood.

Describe in detail the digestion and absorption of lipids. How are lipids transported and utilized throughout...

Describe in detail the digestion and absorption of lipids. How are lipids transported and utilized throughout the body.

vitamin K is necessary for the absorption of vitamin B 12 from the intestines

In regards to the digestive system- Review digestion of carbohydrates: Enzyme Site of digestion/absorption Review of...

In regards to the digestive system- Review digestion of carbohydrates: Enzyme Site of digestion/absorption Review of digestion of proteins: Enzyme Site of digestion/absorption Pepsin Trypsin Chymotrypsin Review digestion of fats: Enzyme Site of digestion/absorption Amylase Lipase

1-outline the steps in the digestion, absorption, and transport fats. 2-describe how an excess of carbohydrate,...

1-outline the steps in the digestion, absorption, and transport fats. 2-describe how an excess of carbohydrate, protien and fat can contribute to body fat stories 3-describe the nutritional concerns of pregnancy with respect to energy, protein, vitamine and minirals Expert Answer

Describe the digestion and absorption and vascular transport of a fat (triacylglycerol). Include/specify all relevant mechanical...

Describe the digestion and absorption and vascular transport of a fat (triacylglycerol). Include/specify all relevant mechanical and chemical digestion mechanisms. Identify specific locations, mechanisms and processes – as well as accessory organ contributions. Explain how specific digestive tract structures and components of other systems play a role in digestion, absorption and transport of this nutrient.

Subjects