Explain the bioavailability of nicotinic acid, Biology

Assignment Help:

Explain the Bioavailability of Nicotinic Acid?

We have already learnt earlier that niacin is provided in the diet primarily as the pyridine nucleotides-NAD and NADP. In addition to its synthesis from dietary niacin, NAD may also be synthesized in the liver from the dietary amino acid, tryptophan. The synthesis of niacin from tryptophan also depends on enzymes that require vitamin B6 and riboflavin, as well as, an enzyme containing haeme (iron). On an average, 1 mg of niacin can be synthesized from the ingestion of 60 mg of tryptophan. Hence, the recommended allowance for niacin is expressed as mg NE (Niacin equivalents) where 1 mg NE = 1mg niacin or 60 mg tryptophan. There are several dietary drug and disease factors that reduce the conversion of tryptophan to niacin, such as the use of oral contraceptives.


Related Discussions:- Explain the bioavailability of nicotinic acid

Shoot multiplication -clonal propagation, Shoot Multiplication -Clonal Prop...

Shoot Multiplication -Clonal Propagation This is the most important step with respect to the rate of propagation and genetic uniformity of the product. The most reliable and

What is smooth muscle, What is Smooth Muscle? Smooth muscle provides th...

What is Smooth Muscle? Smooth muscle provides the contractile force for movement in internal organs under control of the involuntary or autonomic nervous system. Smooth muscle

Coronary vascular resistance reflexly, Baroreceptor activity affects corona...

Baroreceptor activity affects coronary vascular resistance reflexly. With carotid occlusion, baroreceptor hypotension leads to reflex adrenergic stimulation, increased metabolic ac

Possible recombinant genotypes, A woman is heterozygous for three X-linked ...

A woman is heterozygous for three X-linked loci: AaBbDd. She has seven sons with the following genotypes: two are X ABd Y three are X abD Y one is X ABD Y one is X Abd

Symptoms of ulcerative colitis, Q. Symptoms of ulcerative colitis? As d...

Q. Symptoms of ulcerative colitis? As discussed in the case study above, the common symptoms are: 1. Mild abdominaI discomfort, an urgent need to defecate several times a da

State the continuous sutures suturing technique, State the Continuous sutur...

State the Continuous sutures Suturing technique It can be used to attach 2 surgical flap edges or to secure multiple interproximal papillae of one flap independently of the oth

Explain dietary management, Dietary Management The golden  rule  in  th...

Dietary Management The golden  rule  in  the dietary  management  of  ally  fever  is  "feed  the fever". Considering that  enteric (typhoid) fever  is accompanied by anorexia,

Illustrate the applications of vitamin B6, Illustrate the Applications of v...

Illustrate the Applications of vitamin B 6 The heating processes employed in the industry for the sterilization of milk based formulations will greatly reduce their vitamin B

What is cyanobacteria or blue-green bacteria, What is Cyanobacteria or Blue...

What is Cyanobacteria or Blue-green bacteria? Blue-green bacteria, or cyanobacteria, used to be classified as blue-green algae within the Plant Kingdom, primarily because they

Define the needs for enteral feeding, Define the needs for Enteral Feeding?...

Define the needs for Enteral Feeding? For enteral feeding following need to be considered: - In preterm calorie density to be 0.8 Kcal/ml, - LBW formulas used: protein -

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd