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Related Concept Videos

Energy Balance01:19

Energy Balance

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The human body gets energy from the three macronutrients: carbohydrates, proteins, and fats. Energy is released when the chemical bonds in the organic compounds present in the food are broken down. The energy content of food is measured in kilocalories (kcal), defined as the amount of heat required to raise the temperature of one kilogram of water by one degree Celsius. This value is determined by measuring the temperature change of the water surrounding a calorimeter after the complete...
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Obesity01:24

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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...
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In biological systems, most metabolic pathways are interconnected. The cellular respiration processes that convert glucose to ATP—such as glycolysis, pyruvate oxidation, and the citric acid cycle—tie into those that break down other organic compounds. As a result, various foods—from apples to cheese to guacamole—end up as ATP. In addition to carbohydrates, food also contains proteins and lipids—such as cholesterol and fats. All of these organic compounds are used...
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Regulation of Food Intake01:30

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Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
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Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when...
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Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
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Related Experiment Video

Updated: Aug 27, 2025

'Boden Food Plate': Novel Interactive Web-based Method for the Assessment of Dietary Intake
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The Data Behind Popular Diets for Weight Loss.

Sarah E Ehrlicher1, Tsz-Kiu Chui2, Julianne G Clina2

  • 1Department of Nutrition Sciences, University of Alabama at Birmingham, Webb 256, 1675 University Boulevard, Birmingham, AL 35294, USA.

The Medical Clinics of North America
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For weight loss, the key is sticking to your diet, not whether it

Keywords:
Appetite controlCognitive restraintDiet adherenceLow-carbohydrate dietsLow-fat dietsWeight loss

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Area of Science:

  • Nutrition science
  • Dietary interventions
  • Weight management research

Background:

  • Popular diets often focus on restricting carbohydrates or fat for weight loss.
  • Both approaches have a physiologic basis for creating a calorie deficit.

Purpose of the Study:

  • To evaluate the effectiveness of carbohydrate restriction versus fat restriction for weight loss.
  • To identify the primary determinant of successful weight loss.

Main Methods:

  • Review of randomized controlled trials comparing low-carbohydrate and low-fat diets.
  • Analysis of factors influencing weight loss outcomes.

Main Results:

  • Both carbohydrate-restricted and fat-restricted diets are effective for weight loss.
  • Dietary adherence, not macronutrient composition, is the critical factor for success.

Conclusions:

  • Successful weight loss depends on sustained adherence to any dietary plan.
  • Focusing on adherence may be more beneficial than debating macronutrient content.