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Related Experiment Video

Updated: Jun 19, 2026

Studying Food Reward and Motivation in Humans

Studying Food Reward and Motivation in Humans

Published on: March 19, 2014

Cooking and the human commitment to a high-quality diet.

R N Carmody¹, R W Wrangham

¹Department of Human Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.

Cold Spring Harbor Symposia on Quantitative Biology

|October 22, 2009

Summary

This summary is machine-generated.

Cooking significantly enhanced human dietary quality, supporting our evolution. This suggests cooking, not just meat consumption, was crucial for human adaptation to nutrient-rich foods.

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Area of Science:

Human Evolution
Nutritional Science
Archaeological Science

Background:

Humans possess higher energy demands and reduced digestive/masticatory structures compared to chimpanzees.
These traits suggest adaptation to a high-quality diet, with meat consumption playing a role.
However, meat alone doesn't explain these adaptations, as raw meat diets are insufficient for modern humans.

Observation:

Cooking provides physical and chemical advantages to food.
Cooked foods are easier to chew and digest, increasing net energy extraction.
Evidence suggests cooking was adopted over 250,000 years ago, allowing ample time for evolutionary adaptation.

Findings:

Cooking significantly increases the digestibility and net energy value of both plant and animal foods.
The benefits of cooking align with observed human physiological adaptations for diet.
The timeline of cooking adoption (over 250,000 years ago) supports its role in human evolution.

Implications:

Cooking is a critical factor in human dietary adaptation, complementing meat consumption.
Further research is needed to differentiate the impacts of cooking, meat-eating, and other food processing methods.
Understanding the role of cooking offers insights into the evolution of human physiology and diet.