The Reinforcing Value of Added Sugars

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

44 participants

Study Classification

INTERVENTIONAL

Study Start Date

2016-04-30

Study Completion Date

2018-01-16

Brief Summary

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The purpose of this study is to determine how daily diet relates to eating choices.

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Detailed Description

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Despite the long-term emphasis on reducing intake of and added sugar, this behavioral change has been hard to instill amongst most of the population. Foods with added sugars are highly reinforcing and, as such, reducing their consumption in order to adhere to the dietary guidelines (DGA) may be difficult to maintain. Sugar produces effects similar to some drugs of abuse such as increased extracellular dopamine release in the nucleus accumbens shell resulting in a reinforcing effect. Reducing any reinforcing behavior can be challenging, but in terms of food, it is not known whether the reinforcing value of foods high in added sugar increases when access to these foods is reduced. If so, this would present a mechanistic barrier to meeting the DGA and making dietary changes in general. That the reinforcing value of a behavior (e.g., eating sugar) will be increased when the rate of that behavior is decreased has strong theoretical underpinnings in the "Disequilibrium Approach". This theory predicts that the circumstances of reinforcement are created or limited by changing baseline access. According to the Disequilibrium Approach, a response deficit will result in an increase in reinforcement. Applied to the proposed study, the Disequilibrium Approach would predict that lowering the consumption of dietary added sugar would increase the reinforcing value of foods high in added sugar. The Disequilibrium Approach has accurately predicted an increase in the relative reinforcing value (RRV) of snack foods among children. However, dietary changes would need to occur at the whole diet level for adults and children to meet the DGA for reducing added sugar intake. It is important to know if reducing added sugars at the whole-diet level results in increases in the reinforcing value of foods high in added sugars.

Conditions

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Obesity

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

OTHER

Blinding Strategy

NONE

Study Groups

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Low Added Sugar Diet

Menu containing \<10% of total daily energy intake from added sugars.

Group Type EXPERIMENTAL

Low Added Sugar Diet

Intervention Type OTHER

1-week intake of Low Added Sugar Diet 3 day rotating menu

Interventions

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Low Added Sugar Diet

1-week intake of Low Added Sugar Diet 3 day rotating menu

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* BMI within 18.5-24.9 kg/m2 or BMI within 30.0-50.0 kg/m2
* Willing to consent to study conditions
* Habitually consume at least 10% of daily energy intake from added sugars

Exclusion Criteria

* BMI 25.0-29.9 kg/m2
* Currently taking drugs that change hunger
* Have an eating disorder
* Current tobacco user
* Have diabetes or heart disease
* Pregnant, lactating or planning pregnancy
* Low liking of all available study test foods
* Allergy/aversion to any of the foods provided during the diet intervention

Minimum Eligible Age

18 Years

Maximum Eligible Age

39 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes