Nutrition
60 mg of tryptophan will produce _ mg of niacin
1
How many milligrams of tryptophan are required to yield 200 mg of niacin?
12,000
The average meat-eating person has enough vitamin B-12 stored in the liver to last for _
2 to 3 years
What is the ai for biotin
30 ug/day
Glossitis results in
A painful, inflamed tongue
Which B-vitamin is synthesized from tryptophan
Niacin
Which B-vitamin, in high does, was historically prescribed by physicians to increase HDL cholesterol and lower triglyceride levels?
Niacin
Why are corn- based diets associated with pellagra?
Niacin, corn
Currently, niacin-containing medications are _ recommended for most individuals with cardiovascular disease
No longer
Which is true about the upper level for thiamin?
There is no upper body level established for this nutrient
Pork products are excellent sources of _____.
Thiamin
The B vitamin required as a coenzyme to release energy from carbohydrates and some amino acids is
Thiamin
niacin serves as a _____ in energy metabolism
coenzyme
Biotin is found in food as
biocytin free biotin
What happens to excess niacin?
excreted in urine
Which is true about the transport and storage of thiamin
little thiamin is stored in the body, transported by red blood cells
Common food sources for pantothenic acid include
milk and meat
To account for preformed niacin in foods and niacin synthesized from tryptophan, niacin is expressed as _
niacin equivalents
Vitamin B-6 participates in ______ metabolic reactions.
numerous
A pantothenic acid deficiency is
rare
The coenzyme form of pantothenic acid participates in
release of energy from carbohydrates, fats, and proteins. fatty acid synthesis.
Water-soluble vitamins are essential organic substances needed in _ amounts.
small
Where does the breakdown of biotin occur
small intestine
Where is thiamin absorbed?
small intestine
Which vitamin helps maintain gene stability by binding to the proteins that help DNA fold in the cell nucleus?
Biotin
Thiamin is a key component required to metabolize the macronutrient
Carbohydrate
Good sources of biotin include?
Cauliflower,liver,peanuts,egg yolks
Which of the following are good food sources of vitamin B-6
Fish meat poultry
The water-soluble vitamin deficiency that may eventually lead to megaloblastic anemia is due to a lack of which vitamin?
Folate
There is no UL set for riboflavin because it
Has limited absorption and rapid excretion, with no known adverse effects from consuming large quantities
Which is true about riboflavin?
Hydrochloride, in the blood, 60 to 65%
Functions of the riboflavin include
-assisting antioxidant reactions -release of energy from fatty acids
The average daily intake for thiamin in men and women is _ the recommended RDA.
Above
Generally, _ niacin that is consumed is absorbed
Almost all
water soluble vitamins
Are needed for the normal function of body tissues, are needed for the growth of body tissues, and help maintain body tissues
There _ appear to be adverse effects from consuming large amounts of riboflavin
Does not
The prevalence of thiamin deficiency in older adults is
Less common than thought
Riboflavin's conversion to its coenzyme form occurs mainly in the
Liver, small intestine, heart
A deficiency in which of the following vitamins may cause glossitis
Riboflavin
Milk is an excellent source of
Riboflavin
Which vitamin is a component of flavin mono nucleotide and flavin adenine dinucleotide
Riboflavin
The food sources of riboflavin include
Spinach, liver, mushrooms
Which organ produced the intrinsic factor that e chances vitamin B-12 absorption?
Stomach
Select the populations that are at risk of developing a thiamin deficiency
Those with gastrointestinal disease, heart failure patients, those who are obese
Which of the following are characteristics of panthoethnic acid
Transported, storage, part of coenzyme
Which of the following DRIs has not been set for pantothenic acid?
Upper level
