PinDIT: The Role of Phosphorus in Diet Induced Thermogenesis (DIT) of Both Lean and Obese Subjects
Study Details
Study Description
Brief Summary
The study aim at:
Investigating the impact of phosphorus ingestion on DIT of lean and obese subjects consuming high carbohydrate meal.
Investigating the impact of phosphorus ingestion on DIT of lean and obese subjects consuming high protein-low phosphorus meal.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
Subject will be advice to take a weight maintenance diet which contains at least 250-300g of carbohydrate per day for the 3 days before each study day and also he/she will be asked to avoid any intense physical activity during the day before the day of the test. Overnight fasted subjects (> 8 hours) will be requested to attend the testing room at around 8:00 am. The he investigators will take the anthropometric measurements (weight, height, waist circumference) and determine blood glucose.
A crossover design study will be used in which each subject will undertake 2 or 3 sessions in a random order over 2 or 3 different days which are separated by a minimum of one week. The difference between the sessions is the ingestion of placebo ( 4 tablets) or phosphorus (4 tablets, each contain 125mgof phosphorus) tablets with the appropriate meal.
Specific Aim 1: The impact of phosphorus ingestion on DIT of lean and obese subjects consuming high carbohydrate meal (Table 1: Meal 1).
This will be divided into two experiments:
Experiment 1.1: The impact of phosphorus ingestion on DIT of lean subjects consuming high carbohydrate meal (16 subjects).
In this experiment, overnight fasted lean subjects (> 8 hours) will be requested to attend the testing room at around 8:00 am. Anthropometric measurements (weight, height, waist circumference) will be taken, rest for 30 min, measure resting energy expenditure (REE) for 30 min, ingest meal with the appropriate supplement and measure postprandial energy expenditure (PEE) for 4 hours (see figure 3). In this experiment, subject will undertake 3 sessions in a random order over 3 different days which are separated by a minimum of one week.
Session 1: Ingestion of phosphorus tablets (4 tablets) alone. No meal. Needed to determine the impact of phosphorus alone on DIT Session 2: Ingestion of phosphorus tablets (4 tablets) with the high carbohydrate meal (table1: Meal 1).
Session 3: Ingestion of placebo tablets (4 tablets) with the high carbohydrate meal (table 1:
Meal 1).
Experiment 1.2: The impact of phosphorus ingestion on DIT of lean subjects consuming high carbohydrate meal (16 subjects).
In this experiment, overnight fasted obese subjects (> 8 hours) will be requested to attend the testing room at around 8:00 am. Anthropometric measurements (weight, height, waist circumference) will be taken, rest for 30 min, measure resting REE for 30 min, ingest meal with the appropriate supplement and measure PEE for 4 hours (see figure 3). In this experiment, subject will undertake 3 sessions in a random order over 3 different days which are separated by a minimum of one week.
Session 1: Ingestion of phosphorus tablets (4 tables) alone. No meal. Needed to determine the impact of phosphorus alone on DIT Session 2: Ingestion of phosphorus tablets (4 tables) with the high carbohydrate meal (Table 1:Meal 1).
Session 3: Ingestion of placebo tablets (4 tables) with the high carbohydrate meal (Table 1:Meal 1).
Specific Aim 2: The impact of phosphorus ingestion on DIT of lean and obese subjects consuming high protein-low phosphorus meal (table 1: Meal 2).
This will be divided into two experiments:
Experiment 2.1: The impact of phosphorus ingestion on DIT of lean and obese subjects consuming high protein-low phosphorus meal (16 subjects).
In this experiment, overnight fasted lean subjects (> 8 hours) will be requested to attend the testing room at around 8:00 am. Anthropometric measurements (weight, height, waist circumference) will be taken, rest for 30 min, measure REE for 30 min, ingest meal with the appropriate supplement and measure PEE for 4 hours (see figure 3). In this experiment, subject will undertake 2 sessions in a random order over 2 different days which are separated by a minimum of one week.
Session 1: Ingestion of phosphorus tablets (4 tablets) with the high protein meal (table1:
Meal 2).
Session 2: Ingestion of placebo tablets (4 tablets) with the high protein meal (table 1: Meal 2).
Experiment 2.2: The impact of phosphorus ingestion on DIT of lean and obese subjects consuming high protein-low phosphorus meal (16 subjects).
In this experiment, overnight fasted obese subjects (> 8 hours) will be requested to attend the testing room at around 8:00 am. Anthropometric measurements (weight, height, waist circumference) will be taken, rest for 30 min, measure REE for 30 min, ingest meal with the appropriate supplement and measure PEE for 4 hours (see figure 3). Urine sample over the experimental period will be collected. In this experiment, subject will undertake 2 sessions in a random order over 2 different days which are separated by a minimum of one week.
Session 1: Ingestion of phosphorus tablets (4 tablets) with the high protein meal (table1:
Meal 2).
Session 2: Ingestion of placebo tablets (4 tablets) with the high protein meal (table 1: Meal 2).
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Placebo Comparator: phosphorus alone Effect of phosphorus (500mg) ingestion alone. No meal. Needed to determine the impact of phosphorus alone on DIT |
Dietary Supplement: Effect of phosphorus
Ingestion of 500mg of phosphorus ( 4 tablets, each of 125 mg of phosphorus)
|
| Placebo Comparator: high CHO meal alone Ingestion of placebo tablets with the high carbohydrate meal |
Dietary Supplement: Effect of phosphorus
Ingestion of 500mg of phosphorus ( 4 tablets, each of 125 mg of phosphorus)
|
| Active Comparator: High CHO meal plus phosphorus Effect of phosphorus (500mg) tablets ingestion of DIT of the high carbohydrate meal |
Dietary Supplement: Effect of phosphorus
Ingestion of 500mg of phosphorus ( 4 tablets, each of 125 mg of phosphorus)
|
| Active Comparator: High protein meal plus phosphorus Effect of phosphorus (500mg) tablets ingestion of DIT of the high protein meal |
Dietary Supplement: Effect of phosphorus
Ingestion of 500mg of phosphorus ( 4 tablets, each of 125 mg of phosphorus)
|
| Placebo Comparator: High protein meal alone Ingestion of placebo tablets with the high protein meal |
Dietary Supplement: Effect of phosphorus
Ingestion of 500mg of phosphorus ( 4 tablets, each of 125 mg of phosphorus)
|
Outcome Measures
Primary Outcome Measures
- Change in postprandial energy expenditure [4 hours]
Changes in area under the curve (AUC) of postprandial energy expenditure as measured by determining postprandial the volume oxygen consumption (VO2) and the volume of carbon dioxide production (VCO2)
Eligibility Criteria
Criteria
Inclusion Criteria:
-
lean subjects (BMI between 20 and 25);
-
obese (BMI above 30) subjects
Exclusion Criteria:
-
Pregnant and lactating women
-
Subjects on regular use of medication that affects body weight
-
weight loss of 3% or more in the preceding 3 months
-
Subjects with kidney disease
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | American University of Beirut | Beirut | Lebanon |
Sponsors and Collaborators
- American University of Beirut Medical Center
Investigators
- Principal Investigator: Omar A Obeid, PhD, American University of Beirut Medical Center
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- NUT.OO.22