Protein Nutrition During Weight Loss
- Conditions
- Obesity
- Interventions
- Dietary Supplement: Pulse casein feeding during energy restrictionDietary Supplement: Spread casein feeding during energy restrictionDietary Supplement: Pulse milk soluble protein feeding during energy restrictionDietary Supplement: Spread milk soluble protein feeding during energy restriction
- Registration Number
- NCT00690781
- Brief Summary
The purpose of this study is to minimize the loss of lean body mass that occurs during a weight-loss program in obese people by changing the nature of ingested protein and the pattern of protein feeding
- Detailed Description
In most physiological situations, the adequate amount of protein necessary to promote health is more and more well known. However, for an adequate protein intake, it was shown that the kinetic of amino acid delivery to the organism has an influence on the efficiency of protein utilization. In particular, caseins, slowly digested milk proteins, promote a better protein balance than rapidly digested milk soluble proteins in young subjects (Boirie et al., 1997). In addition, changing protein feeding pattern (80% of daily protein consumed at noon vs 25%) significantly affect protein balance (Arnal et al., 2000). In young healthy individuals, the best protein efficiency is obtained by spreading protein absorption over time (casein, and/or 4 isoproteic meal per day). On the contrary, in older individuals, due to alteration in the sensitivity of protein metabolism to feeding, it is better to use rapidly digested proteins (Dangin et al., 2003), and / or to have a protein-rich meal once a day (Arnal et al., 1999).
Another physiological situation that was not studied in this regard is obesity. Obesity incidence is rapidly increasing around the world. When body mass index (weight / height2) becomes too high (\>30), it is often suggested to restrict energy intake. However, severe energy restriction leads to fat mass loss, but also to lean body mass loss, which should be prevented. Our aim is to test whether for an adequate amount of total protein, it is possible to preserve lean body mass by using either casein, or milk soluble proteins, or by changing protein feeding pattern.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 48
- BMI>30
- sedentary
- normal TSH
- any serious health problem
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Casein Pulse Pulse casein feeding during energy restriction casein is the main protein consumed, it is given during 6 weeks with a "pulse" protein feeding pattern : 8% for breakfast, 80% for lunch, 4% around 1600h, and 8% for dinner. Casein Spread Spread casein feeding during energy restriction casein is the main protein consumed, it is given during 6 weeks with a "spread" protein feeding pattern : 25% for breakfast, 25% for lunch, 25% around 1600h, and 25% for dinner. MSP Pulse Pulse milk soluble protein feeding during energy restriction Milk soluble proteins (MSP) are the main protein consumed, it is given during 6 weeks with a "pulse" protein feeding pattern : 8% for breakfast, 80% for lunch, 4% around 1600h, and 8% for dinner. MSP Spread Spread milk soluble protein feeding during energy restriction Milk soluble proteins (MSP) are the main protein consumed, it is given during 6 weeks with a "spread" protein feeding pattern : 25% for breakfast, 25% for lunch, 25% around 1600h, and 25% for dinner.
- Primary Outcome Measures
Name Time Method Lean body mass 6 weeks
- Secondary Outcome Measures
Name Time Method Nitrogen balance 6 weeks whole body leucine turnover 6 weeks
Trial Locations
- Locations (1)
Unité d'Exploration Nutritionnelle (Nutritional Exploration Unit)
🇫🇷Clermont-Ferrand, France