Tags

Type your tag names separated by a space and hit enter

The impact of the covert manipulation of macronutrient intake on energy intake and the variability in daily food intake in nonobese men.
Int J Obes (Lond). 2006 May; 30(5):774-81.IJ

Abstract

OBJECTIVE

To investigate the effect of macronutrient composition on ad libitum food intake in nonobese men.

DESIGN

Balanced, incomplete-block, crossover study where subjects received two of three treatments. Macronutrient composition was manipulated by providing 2.1 MJ/day high-carbohydrate (CHO), high-fat (FAT), and/or high-protein (PRO) drinks every day over the course of two, 8-week periods.

SUBJECTS

In all, 12 healthy normal weight men (age: 39+/-9 years, BMI: 24.1+/-1.4 kg/m2).

MEASUREMENTS

Ad libitum food intake was measured continuously for 16 weeks at the Beltsville Human Nutrition Research Center (BHNRC). Body composition (DEXA) and body weight were also measured.

RESULTS

Average energy intake (EI) during weeks 1 and 2 was lower for CHO than FAT (P<0.05), but this effect disappeared by week 3. EI during CHO increased by 11% from week 1 to 8 through the increased selection of carbohydrate and protein-containing foods, but not fat foods. Food intake was variable, both between and within subjects, but was not related to macronutrient composition.

CONCLUSION

EI appears to be influenced by macronutrient composition in the short-term when diets are modified, but the effect dissipates in a few weeks if the diet is maintained. These data suggest the presence of macronutrient-specific regulatory mechanisms in the body, but do not support the notion that a high intake of any of the three macronutrients suppresses EI over a prolonged period of time. The high variability in food intake does not appear to be related to macronutrient composition.

Authors+Show Affiliations

Diet and Human Performance Laboratory, Beltsville Human Nutrition Research Center, BARC-east, Beltsville, MD 20705, USA. rumpler@bhnrc.arsusda.govNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

16314879

Citation

Rumpler, W V., et al. "The Impact of the Covert Manipulation of Macronutrient Intake On Energy Intake and the Variability in Daily Food Intake in Nonobese Men." International Journal of Obesity (2005), vol. 30, no. 5, 2006, pp. 774-81.
Rumpler WV, Kramer M, Rhodes DG, et al. The impact of the covert manipulation of macronutrient intake on energy intake and the variability in daily food intake in nonobese men. Int J Obes (Lond). 2006;30(5):774-81.
Rumpler, W. V., Kramer, M., Rhodes, D. G., & Paul, D. R. (2006). The impact of the covert manipulation of macronutrient intake on energy intake and the variability in daily food intake in nonobese men. International Journal of Obesity (2005), 30(5), 774-81.
Rumpler WV, et al. The Impact of the Covert Manipulation of Macronutrient Intake On Energy Intake and the Variability in Daily Food Intake in Nonobese Men. Int J Obes (Lond). 2006;30(5):774-81. PubMed PMID: 16314879.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The impact of the covert manipulation of macronutrient intake on energy intake and the variability in daily food intake in nonobese men. AU - Rumpler,W V, AU - Kramer,M, AU - Rhodes,D G, AU - Paul,D R, PY - 2005/11/30/pubmed PY - 2006/12/13/medline PY - 2005/11/30/entrez SP - 774 EP - 81 JF - International journal of obesity (2005) JO - Int J Obes (Lond) VL - 30 IS - 5 N2 - OBJECTIVE: To investigate the effect of macronutrient composition on ad libitum food intake in nonobese men. DESIGN: Balanced, incomplete-block, crossover study where subjects received two of three treatments. Macronutrient composition was manipulated by providing 2.1 MJ/day high-carbohydrate (CHO), high-fat (FAT), and/or high-protein (PRO) drinks every day over the course of two, 8-week periods. SUBJECTS: In all, 12 healthy normal weight men (age: 39+/-9 years, BMI: 24.1+/-1.4 kg/m2). MEASUREMENTS: Ad libitum food intake was measured continuously for 16 weeks at the Beltsville Human Nutrition Research Center (BHNRC). Body composition (DEXA) and body weight were also measured. RESULTS: Average energy intake (EI) during weeks 1 and 2 was lower for CHO than FAT (P<0.05), but this effect disappeared by week 3. EI during CHO increased by 11% from week 1 to 8 through the increased selection of carbohydrate and protein-containing foods, but not fat foods. Food intake was variable, both between and within subjects, but was not related to macronutrient composition. CONCLUSION: EI appears to be influenced by macronutrient composition in the short-term when diets are modified, but the effect dissipates in a few weeks if the diet is maintained. These data suggest the presence of macronutrient-specific regulatory mechanisms in the body, but do not support the notion that a high intake of any of the three macronutrients suppresses EI over a prolonged period of time. The high variability in food intake does not appear to be related to macronutrient composition. SN - 0307-0565 UR - https://www.unboundmedicine.com/medline/citation/16314879/The_impact_of_the_covert_manipulation_of_macronutrient_intake_on_energy_intake_and_the_variability_in_daily_food_intake_in_nonobese_men_ L2 - https://doi.org/10.1038/sj.ijo.0803155 DB - PRIME DP - Unbound Medicine ER -