Related Experiment Video
Updated: Jul 14, 2026
04:48
Control of Eating Behavior Using a Novel Feedback System
Published on: May 8, 2018
A war on obesity, not the obese
1Howard Hughes Medical Institute, The Rockefeller University, 1230 New York Avenue, New York, NY 10021. USA. friedj@mail.rockefeller.edu
Science (New York, N.Y.)
|February 8, 2003
Summary
Obesity may be influenced by evolutionary pressures from ancestral environments, making weight loss a complex challenge for many individuals today.
Area of Science:
- Evolutionary biology
- Obesity research
- Human physiology
Background:
- Modern lifestyles and food availability differ significantly from ancestral environments.
- Human biology evolved under conditions of scarcity and high physical activity.
- These evolutionary adaptations may contribute to weight gain in contemporary settings.
Purpose of the Study:
- To explore the role of evolutionary forces in contemporary obesity.
- To understand how ancestral environmental pressures impact modern weight management.
- To provide a biological context for obesity interventions.
Main Methods:
- Review of evolutionary biology principles.
- Analysis of human physiological adaptations.
- Comparison of ancestral and modern environmental factors.
Main Results:
- Human physiology is adapted to periods of feast and famine.
- Modern obesogenic environments promote energy storage.
- Evolutionary mismatch contributes to the obesity epidemic.
Conclusions:
- Weight loss interventions should consider evolutionary biology.
- Understanding ancestral pressures can inform public health strategies.
- A long-term evolutionary perspective is crucial for tackling obesity.
Related Concept Videos
01:06Fats as Energy Storage Molecules
Triglycerides are a form of long-term energy storage molecules. They are made of glycerol and three fatty acids. To obtain energy from fat, triglycerides must first be broken down by hydrolysis into their two principal components, fatty acids and glycerol. This process, called lipolysis, takes place in the cytoplasm. The resulting fatty acids are oxidized by β-oxidation into acetyl-CoA, which is used by the Krebs cycle. The glycerol that is released from triglycerides after lipolysis directly...
01:29Cholesterol: Significance and Regulation
Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
Considering cholesterol and...
01:24Obesity
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...
01:21Drug Dosing: Obese Patients
In the United States, obesity is a prominent concern. It is linked to heightened mortality rates due to increased occurrences of conditions such as hypertension, atherosclerosis, coronary artery disease, and diabetes compared to nonobese individuals. A patient is classified as obese if their actual body weight surpasses the ideal or desirable body weight by 20%, based on Metropolitan Life Insurance Company data. Ideal body weights consider average weights and heights for males and females...
01:25Pharmacokinetics in Obese Patients: Drug Absorption and Distribution
Obesity significantly alters the pharmacokinetic processes of drug absorption and distribution, presenting unique challenges in medical treatment. The increased fat tissue and decreased lean muscle in obese individuals can significantly affect how drugs are absorbed into the body and distributed across different tissues. This alteration can lead to variances in the effectiveness and safety of medications, necessitating adjustments in dosing or drug selection for obese patients.One notable...
01:23Binge Eating Disorders
Binge eating disorder is a significant mental health condition characterized by recurrent episodes of excessive food consumption within a short period, accompanied by a perceived loss of control over eating behavior. Unlike occasional overeating, binge eating disorder is marked by distressing emotions such as guilt, shame, and anxiety following binge episodes. The disorder affects individuals across different ages and backgrounds, with profound implications for physical and psychological...