Effect of 1-Year Dairy Product Intervention on Fat Mass

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Effect of 1-Year Dairy Product Intervention on Fat Mass in Young Women: 6-Month Follow-up

Marianne S. Eagan*, Roseann M. Lyle, Carolyn W. Gunther, Munro Peacock and Dorothy Teegarden
* Departments of Foods and Nutrition and
Health and Kinesiology, and
Interdepartmental Nutrition Program, Purdue University, West Lafayette, Indiana and
Department of Medicine, Indiana University, Indianapolis, Indiana.

Address correspondence to Dorothy Teegarden, Interdepartmental Nutrition Program, Purdue University, 1264 Stone Hall, 700 West State Street, West Lafayette, IN 47907. E-mail: dteegard@purdue.edu

Objective: Previous results from this laboratory suggest that a 1-year dairy intake intervention in young women does not alter fat mass. The objective of this study was to determine the impact of the 1-year dairy intervention 6 months after completion of the intervention.

Research Methods and Procedures: Previously, normal-weight young women (n = 154) were randomized to one of three calcium intake groups: control (<800 mg/d), medium dairy (1000 to 1100 mg/d), or high dairy (1300 to 1400 mg/d) for a 1-year trial (n = 135 completed). In the current study, 51 women were assessed 6 months after completion of the intervention trial. Body compositions (body fat, lean mass) were measured using DXA. Self-report questionnaires were utilized to measure activity and dietary intake (kilocalories, calcium).

Results: The high-dairy group (n = 19) maintained an elevated calcium intake (1027 * 380 mg/d) at 18 months compared with the control group (n = 18, 818 * 292; p = 0.02). Mean calcium intake over the 18 months predicted a negative change in fat mass (p = 0.04) when baseline BMI was controlled in regression analysis (model R2 = 0.11). 25-Hydroxyvitamin D levels were correlated with fat mass at each time-point (baseline, r = –0.41, p = 0.003; 12 months, r = –0.42, p = 0.002; 18 months, r = –0.32, p = 0.02) but did not predict changes in fat mass.

Discussion: Dietary calcium intake over 18 months predicted a negative change in body fat mass. Thus, increased dietary calcium intakes through dairy products may prevent fat mass accumulation in young, healthy, normal-weight women.



Bijgaande tekst:

New Study Suggests Drinking More Milk Could Prevent Fat Gain
Making milk your beverage of choice and maintaining this habit for 18 months may help prevent fat gain, suggests a new study published in Obesity.

Researchers at Purdue University conducted a follow-up study of 51 normal weight college-aged women who had previously participated in a year-long intervention that examined the impact of increased dairy intake on fat mass. Six months after the initial study was completed, the women in the high-dairy group had maintained an elevated calcium intake; the researchers emphasized increasing consumption of lowfat and fat free milk to help boost calcium intakes.

The researchers found that the women who had maintained a high-dairy/high-calcium intake over the entire 18-month period had significantly lower fat mass compared to the women with lower calcium and dairy intakes (less than 800 mg of calcium per day).

At the start of the 12-month clinical study, women had low calcium intakes and were instructed to follow one of three diets – a low-dairy diet (less than 800 mg calcium per day), a medium-dairy diet (1,000 – 1,100 mg calcium per day) or a high-dairy diet (1,300 – 1,400 mg calcium per day). While no body fat or weight differences were found during the first year, the researchers detected a significant difference between the low-dairy diet and high-dairy diet when they revisited the women six months later.

The researchers concluded that the effect of dairy products such as milk or calcium on fat and weight may be small and difficult to detect in just one year among normal weight young women, but that habitual intake of dairy products rich in calcium like lowfat or fat free milk over a longer time period may be linked to healthy weight management benefits.

The authors conclude that "it is important to develop strategies to promote increased calcium intakes in the U.S. population because intakes are generally far below current recommendations."

Dietary guidelines recommend three servings (or 24 ounces) of lowfat or fat free milk each day for Americans over age 8, and two servings for children under age 8.

Eagan MS, Lyle RM, Gunther CW, Peacock M, Teegarden D. Effect of 1-year dairy product intervention on fat mass in young women: 6-month follow-up. Obesity. 2006;14:2242-2248.

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[Aequitas]

Interesting..

 

[builderB]

hmz....

gaat dus in eerste plaats om calcium, niet om zuivel? (of heeft de zuivelindustrie er een paar dollars in gestoken?)
Dat calcium belangrijk is voor het goed functioneren van het lichaam behoeft geen verdere uitleg natuurlijk. In essentie is de geladen versie (Ca2+) dé 'beweger' onder de voedingsstoffen!

ik vind het allemaal niet heeeel erg schokkend eigenlijk.

Melk is daarnaast toch ook niet een bijzonder goede bron van calcium? (maar daar kan ik naast zitten)

 

[Muay Thai J]

hmz....

gaat dus in eerste plaats om calcium, niet om zuivel? (of heeft de zuivelindustrie er een paar dollars in gestoken?)
Dat calcium belangrijk is voor het goed functioneren van het lichaam behoeft geen verdere uitleg natuurlijk. In essentie is de geladen versie (Ca2+) dé 'beweger' onder de voedingsstoffen!

ik vind het allemaal niet heeeel erg schokkend eigenlijk.

Melk is daarnaast toch ook niet een bijzonder goede bron van calcium? (maar daar kan ik naast zitten)

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Neen, het gaat om calcium UIT zuivel! Tenminste als ik dit artikel goed heb verstaan
http://forum.dutchbodybuilding.com/...-intake-on-postprandial-fat-metabolis-113212/

3 glazen per dag... dus met 1 liter melk zit je zeker aan de ideale hoeveelheid! + nog eens de hoeveelheid calcium uit kwark etc...

 

[isdatzo]

Objective: Previous results from this laboratory suggest that a 1-year dairy intake intervention in young women does not alter fat mass. The objective of this study was to determine the impact of the 1-year dairy intervention 6 months after completion of the intervention.

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Vergeet niet dat in eerste instantie geen associatie tussen dairy en fat mass werd gevonden.

Discussion: Dietary calcium intake over 18 months predicted a negative change in body fat mass. Thus, increased dietary calcium intakes through dairy products may prevent fat mass accumulation in young, healthy, normal-weight women.

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Hier wordt gesuggereerd dat calcium verantwoordelijk zou zijn voor het verlies in vetmassa. Dat is wetenschappelijk gezien totaal onjuist. Er zou alleen sprake kunnen zijn van een bewezen effect door calcium wanneer de ene groep normale melk kreeg en de andere groep dezelfde hoeveelheid melk kreeg die was gesupplementeerd met calcium. Met andere woorden: wanneer calcium de enige variabele was.

Bijgaande tekst:


The authors conclude that "it is important to develop strategies to promote increased calcium intakes in the U.S. population because intakes are generally far below current recommendations."

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Waar baseren ze dit in godsnaam op. Er is helemaal niets aangetoond door calcium. De studie onderzoekt zuivel en trekt gemakshalve maar de conclusie dat calcium inname moet worden bevorderd. Wetenschap van de onderste plank! Met de studie is niets mis. Met de "conclusies" wel.