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Calcium Function, Dietary requirements, Absorption, Toxicity

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Understand the physiological functions of calcium ... Name 3 food sources of calcium. State the requirement for absorption, amount absorbed ... – PowerPoint PPT presentation

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Title: Calcium Function, Dietary requirements, Absorption, Toxicity


1
Calcium Function, Dietary requirements,
Absorption, Toxicity
  • Emily K. Kinison, B.S
  • Texas Childrens Hospital
  • Baylor College of Medicine
  • L.E.A.H. Fellow, MPH Candidate

2
Goals
  • The learner will…
  • Understand the physiological functions of calcium
  • Understand requirements throughout the lifecycle
  • Recognize dietary sources
  • Understand factors affecting absorption
    excretion
  • Understand the threshhold and effects of calcium
    toxicity

3
Objectives
  • The learner will be able to…
  • State 3 functions of calcium
  • State the calcium requirement for 19-30 y/o
  • Name 3 food sources of calcium
  • State the requirement for absorption, amount
    absorbed
  • State the upper tolerable limit

4
Facts
  • Most common mineral in the body
  • 99 in bones and teeth
  • Aids in structural, enzymatic, signaling functions

5
Functions
  • Structural bones and teeth
  • Enzymatic blood coagulation
  • Cell Signaling
  • Muscle contraction
  • Vaso-constriction, vaso-dilation
  • Nerve impulse transmission
  • Hormone secretion (eg insulin)

6
Calcium requirements are based on…?
  • Age
  • B) Sex
  • C) Weight
  • D) Ethnicity

7
Calcium requirements are based on…?
  • A) Age
  • B) Sex
  • C) Weight
  • D) Ethnicity

8
How much calcium do you need per day?
9
Dietary Requirements
10
Which of these foods contains the most calcium?
A) 1 cup raw broccoli B) ½ cup cottage
cheese C) 1 cup (8 oz.) milk D) 1 ounce
almonds
11
Food Sources of Calcium
  • Dairy
  • Leafy Greens
  • broccoli, collards, turnip greens, kale
  • Calcium-Fortified Foods
  • orange juice

12
Dairy Food Sources
1 cup plain yogurt 415 mg
8 fl. oz. Skim Milk 306 mg
1 oz. cheddar cheese 118 mg
13
Non-Dairy Food Sources
Collard greens, ½ cup cooked 133 mg
Almonds, ¼ cup 96 mg
Broccoli, 1 med. stalk cooked 72 mg
Orange Juice, Calcium-Fortified (8 fl. oz.)
350 mg
14
Comparing Food Sources
6 cups raw broccoli
OR

100 almonds
8 fl. oz. Skim Milk
2 ¼ cups cottage cheese
OR
15
Which of these foods contains the most calcium?
  • A) 1 cup raw broccoli
  • B) ½ cup cottage cheese
  • C) 1 cup (8 oz.) milk
  • D) 1 ounce almonds

16
For proper absorption, calcium requires help
from…?
  • Vitamin E
  • Vitamin K
  • Vitamin D
  • None of the above
  • All of the above

17
For proper absorption, calcium requires help
from…?
  • Vitamin E
  • Vitamin K
  • Vitamin D
  • None of the above
  • All of the above

18
Calcium absorption is affected by…
  • Age
  • Vitamin D
  • Pregnancy
  • Plant substances
  • Alcohol

19
How much calcium can you absorb at one time?
  • 250 mg
  • 500 mg
  • 1000 mg
  • 1500 mg
  • No limit

20
How much calcium can you absorb at one time?
  • 250 mg
  • 500 mg
  • 1000 mg
  • 1500 mg
  • No limit

21
Which of the following may cause calcium loss?
  • High protein diets
  • Smoking
  • Excessive caffeine intake
  • All of the above
  • None of the above

22
Which of the following may cause calcium loss?
  • High protein diets
  • Smoking
  • Excessive caffeine intake
  • All of the above
  • None of the above

23
Calcium excretion is affected by…
  • Sodium, Protein intake
  • Caffeine use
  • Alcohol consumption
  • Smoking

24
How much is too much calcium?
Upper Tolerable Limit (UTL) 2500 mg/day
25
Calcium toxicity
  • Signs Symptoms
  • Constipation, dry mouth, irritability
  • Long-term effects
  • Kidney stones
  • Hyper-calcemia
  • Renal insufficiency

26
Summary
  • Calcium performs crucial roles supporting
  • Bones and muscles
  • Also Vascular/Nervous/Endocrine systems
  • Dietary requirements peak in adolescence
  • Dietary sources of calcium
  • Dairy, leafy greens, calcium-fortified foods
  • Vitamin D is required for Ca absorption
  • 500 mg of Ca may be absorbed at one time
  • The Upper Tolerable Limit of Ca is 2500 mg/day

27
Any Questions?
28
References
  • http//dietary-supplements.info.nih.gov/factsheets
    /calcium.asp
  • http//www.nichd.nih.gov/milk/prob/calcium_sources
    .cfm
  • http//www.hsph.harvard.edu/nutritionsource/calciu
    m.html
  • http//www.nlm.nih.gov/medlineplus/calcium.html
  • http//lpi.oregonstate.edu/infocenter/minerals/cal
    cium/index.html
  • http//www.merck.com/mrkshared/mmanual/section2/ch
    apter12/12d.jsp
  • http//www.iom.edu/Object.File/Master/7/294/0.pdf
  • http//www.nal.usda.gov/fnic/foodcomp/search/
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