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Related Experiment Video

Updated: May 11, 2026

Assessment of Social Transmission of Food Preferences Behaviors

Assessment of Social Transmission of Food Preferences Behaviors

Published on: January 25, 2018

Adolescent Purchasing Behavior at McDonald's and Subway.

Lenard I Lesser¹, Karen C Kayekjian, Paz Velasquez

¹Palo Alto Medical Foundation Research Institute, Palo Alto, California.

The Journal of Adolescent Health : Official Publication of the Society for Adolescent Medicine

|May 11, 2013

Summary

Adolescents purchasing fast food at Subway restaurants consumed similar calorie amounts as those eating at McDonald's. Despite marketing, neither chain offers a significantly lower-calorie meal option for teens.

Keywords:

Adolescents Fast food Obesity

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Area of Science:

Nutritional Science
Adolescent Health
Consumer Behavior

Background:

Fast food consumption is prevalent among adolescents.
Restaurants marketed as "healthy" may influence food choices.
Understanding calorie intake at different fast-food chains is crucial for public health.

Purpose of the Study:

To compare the number of calories adolescents purchase at Subway versus McDonald's.
To determine if "healthy" marketing impacts adolescent fast-food calorie consumption.

Main Methods:

A study involving 97 adolescents who purchased meals at both McDonald's and Subway.
Each participant served as their own control, comparing calorie intake across both restaurants.
Calorie differences were analyzed in a diverse Los Angeles, California population.

Main Results:

Adolescents consumed an average of 1,038 calories at McDonald's and 955 calories at Subway, a difference not statistically significant.
Significantly more calories were purchased from drinks and side dishes at McDonald's.
Adolescents purchased fewer vegetables at McDonald's compared to Subway.

Conclusions:

Adolescents purchasing meals at Subway consumed a similar number of calories as those at McDonald's.
Despite Subway's "healthy" marketing and higher vegetable content, overall calorie intake was comparable.
Meals from both fast-food chains may contribute to excessive calorie consumption in adolescents.