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Regulation of Food Intake01:30

Regulation of Food Intake

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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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Hormones Regulating Blood Glucose01:16

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Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
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Hypoglycemia and Glucagon01:15

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Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
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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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Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
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Oral Hypoglycemic Agents: α-Glucosidase Inhibitors01:19

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α-glucosidase inhibitors, including acarbose (Precose), miglitol (Glyset), and voglibose (Voglib) (primarily available in Asia), are drugs that control blood sugar levels by delaying the digestion of starch and disaccharides. They achieve this by inhibiting α-glucosidase enzymes in the intestine, which slow the absorption of carbohydrates in the intestine, which in turn leads to a prolonged release of the glucoregulatory hormone GLP-1 from intestinal L-cells.
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A RAPID Method for Blood Processing to Increase the Yield of Plasma Peptide Levels in Human Blood
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Visual food cues decrease postprandial glucose concentrations in lean and obese men without affecting food intake and

Swantje Brede1, Annika Sputh1, Ann-Christin Hartmann1

  • 1Department of Internal Medicine I, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany.

Appetite
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PubMed
Summary
This summary is machine-generated.

Viewing food pictures before eating helps regulate blood glucose in lean and obese men. This exposure to food cues does not immediately increase calorie intake or affect eating behavior.

Keywords:
AnticipationCephalic phase responseFood intakeFood picturesGlucose homeostasisVisual cues

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Area of Science:

  • Metabolic research
  • Neuroscience
  • Obesity research

Background:

  • Environmental factors like palatable food can lead to overconsumption.
  • Neuroimaging shows food cues activate brain regions for homeostatic and hedonic processing.
  • The effect of food cues on actual intake and metabolic parameters requires further investigation.

Purpose of the Study:

  • To test if viewing high-calorie food cues increases food intake and alters blood parameters in lean and obese men.
  • To investigate the impact of food cues on glucose homeostasis and endocrine responses.
  • To determine if food cues trigger overconsumption or improve metabolic regulation.

Main Methods:

  • 20 normal-weight and 20 obese healthy fasted men participated.
  • Participants viewed high-calorie food pictures versus neutral content.
  • Food intake was measured via a test buffet and subsequent snacking.
  • Glucose homeostasis and endocrine parameters were assessed.

Main Results:

  • Viewing food pictures reduced postprandial blood glucose in both lean and obese subjects.
  • No significant differences were observed in insulin or C-peptide levels.
  • Total calorie intake during the buffet and snack consumption remained unaffected.
  • Ghrelin, ACTH, cortisol, and glucagon concentrations were also unaffected.

Conclusions:

  • Preprandial processing of food cues can mitigate postprandial blood glucose spikes.
  • Exposure to food cues does not acutely lead to calorie overconsumption in men.
  • Food cues may enhance the glucoregulatory response to food intake.