Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
45 participants
INTERVENTIONAL
2010-04-30
2010-08-31
Brief Summary
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Detailed Description
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Thus the specific aims of this project include:
* to establish calcium requirements
* to establish the relationship between calcium intake and calcium absorption
* to identify the major physiological parameters(kidney, intestine, bone) that contribute to calcium retention in Mexican-American adolescents
During this two-phase metabolic camp participants will consume either a higher calcium diet(1100-2300mg/d) or a lower calcium diet (600-1200mg/d) during the first 3-week phase and switch to the opposite regime during the second 3-week phase, with a 2-week washout period in between. Subjects will collect all excreta during both phases. Calcium absorption, height, weight, and bone density will evaluated throughout the 6-week period of the study.
Conditions
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Study Design
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RANDOMIZED
CROSSOVER
PREVENTION
SINGLE
Study Groups
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Low Calcium Diet (600-1200 mg/d)
Low Calcium Diet
The basal diet will contain 600 mg of Ca per day and constant sufficient amounts of all other nutrients. Additional Ca will be given unfortified beverages served three times per day. Teens will be randomized to a lower (600-1200 mg/d)level of calcium in the first camp followed by the opposite (higher calcium diet)regime in the second camp.
High Calcium Diet (1100-2300mg/d)
High Calcium Diet
The basal diet will contain 600 mg of Ca per day and constant sufficient amounts of all other nutrients. Additional Ca will be given unfortified beverages served three times per day. Teens will be randomized to a higher (1100-2300mg/d)level of calcium in the first camp followed by the opposite (lower calcium diet)regime in the second camp.
Interventions
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Low Calcium Diet
The basal diet will contain 600 mg of Ca per day and constant sufficient amounts of all other nutrients. Additional Ca will be given unfortified beverages served three times per day. Teens will be randomized to a lower (600-1200 mg/d)level of calcium in the first camp followed by the opposite (higher calcium diet)regime in the second camp.
High Calcium Diet
The basal diet will contain 600 mg of Ca per day and constant sufficient amounts of all other nutrients. Additional Ca will be given unfortified beverages served three times per day. Teens will be randomized to a higher (1100-2300mg/d)level of calcium in the first camp followed by the opposite (lower calcium diet)regime in the second camp.
Eligibility Criteria
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Inclusion Criteria
* Mexican American boys age 13-15
* Mexican American girls age 12-14
Exclusion Criteria
* Anemia
* Smoking
* History of medications known to affect calcium metabolism
* Body weight outside 85-120% of ideal body weight for height
* Regular consumption of illegal drugs
* Contraceptive use
* Pregnancy
12 Years
15 Years
ALL
Yes
Sponsors
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Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Purdue University
OTHER
Responsible Party
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Berdine Martin
Research Scientist, Nutrition Science
Principal Investigators
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Connie Weaver, PhD
Role: PRINCIPAL_INVESTIGATOR
Purdue University
Berdine Martin, PhD
Role: STUDY_DIRECTOR
Purdue University
Locations
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Purdue University
West Lafayette, Indiana, United States
Countries
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References
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Palacios C, Martin BR, McCabe GP, McCabe L, Peacock M, Weaver CM. Dietary calcium requirements do not differ between Mexican-American boys and girls. J Nutr. 2014 Aug;144(8):1167-73. doi: 10.3945/jn.113.188318. Epub 2014 May 28.
Other Identifiers
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Camp Calcium 11
Identifier Type: -
Identifier Source: org_study_id
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