Name ___________________________ Points _______________________ out of 10 Assign
ID: 127541 • Letter: N
Question
Name ___________________________ Points _______________________ out of 10
Assignment 13 Iron Absorption Worksheet (extra credit)
This Activity will help you determine how much iron is found in foods and how much is absorbed into the body. Note that to increase your absorption of iron from your foods a source of vitamin C at the same meal is essential.
Use Diet Analysis software to calculate the amount of iron and vitamin C found in the following foods.
FOOD
Mg Iron
Mg Vitamin C
3 oz chicken breast meat
0.88
00.00
2/3 cup cooked broccoli
0.44
54.39
1 small baked potato
1.85
22.32
2 tbs sour cream
0.02
00.26
1 cup vanilla ice cream
0.15
00.86
Totals
3.34
77.83
_____________ How many milligrams (mg) total iron was in the chicken?
_____________ On the average, 40 percent heme iron is found in chicken. Calculate the following to determine mg of heme iron in the chicken.
______ mg(step1) x .40 = ____mg heme iron
____________ How much total iron came from the broccoli, potato, sour cream and ice cream?
___________ Calculate the following to obtain mg of nonheme iron.
____ mg(step 1) x .60 =_____+____ mg(step 3)=_________mg
_____________ How much vitamin C was in the above meal. Use the following information:
Less than 25 mg= low
25-75 mg = medium
More than 75 mg =high
______25% _______ Assume that the percent rate of heme iron absorbed is 25%
_____________ Calculate the following to obtain mg of heme iron absorbed.
____ mg (step 2) x ______% (step 6)= _____mg
____________ Use the following information to determine how much MFP factor was in the chicken
Less than 1 ounce chicken= low
1-3 ounces chicken= medium
More than 3 ounces= high MFP
_____________ Review the amounts of vitamin c (step5) and MFP (step8) to determine the percent availability of nonheme iron. Use the following information:
If either Vitamin C or MFP was high or if both were medium, the availability is high or 8%
If neither was high, but one was medium, the availability is medium or 5%
If both were low, availability is low or 3%
Complete the following to determine the actual amount of mg of nonheme iron absorbed
_____Mg(step4) x _____% availability (step 9) = _____mg
_____________ Add mg heme absorbed (step 7) and mg nonheme absorbed (step 10) to obtain total iron absorbed from the meal. ( Show your calculations)
____________ What is your RDA for iron (see the RDA table in the textbook or use Diet analysis software)?
___________%_ The RDA for iron is based on the assumption that you will absorb 10% of the iron you ingest. Therefore, if you are a man of any age or a woman over fifty, you need to absorb one mg per day of iron. If you are a woman age eleven to fifty, you need to absorb 1.5 mg per day of iron. To determine what percent of your iron needs would be met with the above meal, divide by 1 mg or 1.5 mg into mg iron absorbed (step 11). ( Show your calculations) (step 11) ÷1 or 1.5 x 100=
____________ Would the percent of iron obtained from the meal above be enough to satisfy your DAILY personal RDA for iron? Yes or No
What, if anything, could you do to improve your iron status?
FOOD
Mg Iron
Mg Vitamin C
3 oz chicken breast meat
0.88
00.00
2/3 cup cooked broccoli
0.44
54.39
1 small baked potato
1.85
22.32
2 tbs sour cream
0.02
00.26
1 cup vanilla ice cream
0.15
00.86
Totals
3.34
77.83
Explanation / Answer
1. 0.88mg
2.0.35mg (1.334mg, if 40% of the iron presented in chicken calculated from total ammount of iron)
3. Total nonheme iron from broccoli, potato, sour cream and ice cream
=0.44+ 1.85+0.02+0.15 = 2.66Non heme
4. 77.83mg
5. Less than or equal to
6. 2.505 mg
7. 2.505mg non heme iron is absorbed
8. 0.835 +2.5.0 = 3.34 total oron was absorbed
9. 97 - 98%
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