No evidence for metabolic adaptation in thermic effect of food by dietary protein

Objective Determine whether prolonged consumption of high‐ or low‐protein diets modifies the thermogenic response to a standard meal. Methods Twenty‐four healthy individuals were randomized to overfeeding diets containing low (5%, n = 8), normal (15%, n = 9), or high (25%, n = 7) protein for 56 days...

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Published in:Obesity (Silver Spring, Md.) Md.), 2016-08, Vol.24 (8), p.1639-1642
Main Authors: Sutton, Elizabeth F., Bray, George A., Burton, Jeffrey H., Smith, Steven R., Redman, Leanne M.
Format: Article
Language:English
Subjects:
Adult
Behavior
Body composition
Calorimetry, Indirect
Clinical trials
Diet
Diet, Protein-Restricted
Dietary Carbohydrates - administration & dosage
Dietary Proteins - administration & dosage
Energy Intake - physiology
Energy Metabolism - physiology
Feeding Behavior
Female
Food
Humans
Hypotheses
Male
Metabolism
Proteins
Software
Studies
Thermogenesis
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Summary:Objective Determine whether prolonged consumption of high‐ or low‐protein diets modifies the thermogenic response to a standard meal. Methods Twenty‐four healthy individuals were randomized to overfeeding diets containing low (5%, n = 8), normal (15%, n = 9), or high (25%, n = 7) protein for 56 days while inpatients. The thermic effect of food (TEF) was measured over 4 h by indirect calorimetry following a standard meal (20% of energy, 20% protein) or a meal that matched the study diet (“study meal”). Results As expected, the TEF following the study meal (i.e., either low, normal, or high protein content) was significantly associated with dietary protein (P = 0.007), and the TEF was significantly increased in the high‐protein diet (15.4%) versus the normal‐protein (5.6%) and low‐protein diets (6.4%) (P = 0.05 and P = 0.03, respectively). However, returning to a standard meal (20% protein) after 42 days of overfeeding the study diets, the TEF response did not differ from baseline between groups or within subjects regardless of the prolonged intake of the habitual study diet (high protein: P = 0.32, low protein: P = 0.11, normal protein: P = 0.79). Conclusions TEF is related to acute dietary protein intake but not altered by prolonged intake of high‐energy diets with high or low protein content.
ISSN:1930-7381
1930-739X
DOI:10.1002/oby.21541