Ultraprocessed Foods (UPF)

2-Week Food Experiment: Junk Food Hijacks Hunger Signals and Double Fat Gain

by Mike Mutzel

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This study compares the effects of ultra-processed versus unprocessed foods on body composition, revealing that participants consuming ultra-processed foods gained weight and body fat despite similar exercise levels, with notable differences in energy consumption and hormonal responses.

 

 

Tools Mentioned:

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Research Mentioned:

Hall, K. D. et al. Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake. Cell Metab. 30, 67-77.e3 (2019).

 

Time Stamps:

00:18  Start

01:10 Measured: body composition, DEXA body fat percentage, muscle mass, body weight,
bloodwork.

02:35 Processed food participants gained weight.

05:00 All participants exercised 20 min/day.

05:20 Ultra-processed meals cost $106/wk and unprocessed food cost $150/wk.

07:00 Overconsumption of energy took place in the morning and lunchtime.

07:55 Processed foods are eaten faster.

09:55 Ultra-processed food participants ate 500 more calories/day.

10:20 Ultra-processed foods are low in or devoid of protein.

12:50 Bodyfat increased by .4 kg during processed phase and decreased by .3 kg in
unprocessed.

13:50 Fat mass and body weight increased in the processed food phase.

14:50 Glucose homeostasis and insulin level differences were minimal.

16:22 PYY increased and ghrelin decreased in the unprocessed phase.

17:34 Adiponectin, total cholesterol, C reactive protein, T3 decreased during the
unprocessed phase.

19:00 Exercise likely equalized insulin/glucose differences between the groups.

 


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