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Related Concept Videos

Metabolic States of the Body: Fasting and Starvation01:24

Metabolic States of the Body: Fasting and Starvation

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During the initial hours of fasting, the body uses up its glycogen stores as an energy source. Once these glycogen reserves are depleted, the body begins breaking down stored triglycerides and structural proteins. During this stage, glycerol becomes a key substrate for gluconeogenesis, while free fatty acids undergo beta-oxidation to provide energy for tissues, such as skeletal muscle. In the fasting state, the body spares protein breakdown as much as possible to conserve muscle and structural...
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Metabolic States of the Body: The Postabsorptive State01:18

Metabolic States of the Body: The Postabsorptive State

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The postabsorptive state usually starts about four hours after a meal and lasts until the next meal is eaten. During this time, the digestive system stops absorbing nutrients, and the body uses stored energy reserves to maintain stable blood glucose levels.
Initially, glycogen stored in the liver is broken down to release glucose into the bloodstream, while glycogen in the muscles is broken down to supply glucose for energy directly within the muscle cells. As glycogen stores diminish,...
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Metabolic States of the Body: The Absorptive State01:25

Metabolic States of the Body: The Absorptive State

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During the absorptive state, which lasts approximately four hours after a meal, the body absorbs nutrients from the gastrointestinal tract. The carbohydrates, proteins, and lipids we consume are broken down into monosaccharides, amino acids, and free fatty acids for absorption. While carbohydrates and proteins are absorbed as-is, lipids are absorbed in their broken-down forms and then re-esterified into triglycerides within enterocytes before being packaged into chylomicrons. These absorbed...
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Glucose Homeostasis: Regulation of Blood Glucose01:02

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Carbohydrates consumed through foods are converted into glucose, a crucial energy source for the body. In the prandial state, high blood glucose levels stimulate the secretion of insulin from the pancreas. Insulin inhibits hepatic glucose production and stimulates glucose uptake and metabolism by muscle and adipose tissue. The excess glucose is converted into glycogen and stored in the liver and muscles.
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Fats as Energy Storage Molecules01:06

Fats as Energy Storage Molecules

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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...
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Overview of Lipid Metabolism01:24

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Lipid metabolism is a crucial process in the human body that involves the synthesis and degradation of lipids. This process is essential for energy production, cell membrane formation, and hormone production, among other functions.
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Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice
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Intermittent fasting and ketone bodies.

Geovana Rosa Oliveira Dos Santos1, Thiago Amorim de Souza Lima1, Merle Gallus2

  • 1Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.

Progress in Brain Research
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Intermittent fasting (IF) offers brain health benefits by triggering adaptive stress responses. This dietary strategy enhances neuroprotection, cognitive function, and may combat neurodegenerative diseases and depression.

Keywords:
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Area of Science:

  • Neuroscience
  • Metabolic Health
  • Cellular Biology

Background:

  • Intermittent fasting (IF) is a dietary approach involving time-restricted eating.
  • IF is explored for its potential to increase longevity and improve brain health.
  • Mechanisms involve hormesis, cellular stress adaptation, and metabolic switching.

Purpose of the Study:

  • Investigate the neuroprotective and anti-inflammatory effects of IF.
  • Explore IF as a non-pharmacological intervention for brain health.
  • Assess IF's potential in managing neurodegenerative diseases and mood disorders.

Main Methods:

  • Review of existing research on intermittent fasting and brain health.
  • Analysis of cellular and molecular mechanisms underlying IF's effects.
  • Examination of IF's impact on neurotrophic factors, neurogenesis, autophagy, and synaptic plasticity.

Main Results:

  • IF promotes brain-derived neurotrophic factor (BDNF), neurogenesis, and autophagy.
  • Metabolic shifts during IF increase ketone bodies, providing alternative CNS energy.
  • IF demonstrates neuroprotective, anti-inflammatory, and potential antidepressant effects.

Conclusions:

  • Intermittent fasting shows promise as a therapeutic strategy for neurodegenerative diseases like Alzheimer's and Parkinson's.
  • IF's ability to modulate cellular stress, inflammation, and energy metabolism supports cognitive function.
  • Further research is warranted to fully elucidate and validate IF's neuroprotective and mood-regulating capabilities.