Related Experiment Video
Updated: Jul 13, 2026
07:15
An In Vitro Batch-culture Model to Estimate the Effects of Interventional Regimens on Human Fecal Microbiota
Published on: July 31, 2019
Summary
Coarse wheat bran significantly increases stool weight and water content compared to fine bran. Particle size is crucial for bran
Area of Science:
- Dietary fiber research
- Gastrointestinal physiology
Background:
- Dietary fiber, particularly wheat bran, is known to influence bowel function.
- The physical properties of fiber, such as particle size, may affect its physiological effects.
Purpose of the Study:
- To investigate the impact of wheat bran particle size on stool weight and water content.
- To compare the effects of coarse versus fine wheat bran on normal subjects.
Main Methods:
- Twenty-eight investigations were conducted on 21 healthy individuals.
- Subjects consumed 20 g (dry weight) of either coarse or fine wheat bran daily.
- Stool weight and water-holding capacity were measured.
Main Results:
- Coarse bran significantly increased stool weight (mean 219.4 g/d) compared to fine bran (mean 199.0 g/d).
- Coarse bran exhibited a higher water-holding capacity (7.3 g water/g bran) than fine bran (3.9 g water/g bran).
- Coarse bran has a larger volume per unit weight, influencing intake when measured by spoonful.
Conclusions:
- The particle size of wheat bran is a critical factor influencing its efficacy in increasing stool weight and water content.
- Coarse wheat bran is more effective than fine wheat bran in promoting bowel regularity.
- Clinical recommendations for bran intake should consider particle size to optimize therapeutic benefits.
Related Concept Videos
01:22Drugs Affecting GI Tract Motility: Bulk-Forming and Stimulant Laxatives
Laxatives enhance bowel movements and alleviate constipation. They augment the stool's bulk, stimulate intestinal muscle contractions, draw water into the intestines, or soften the stool. There are five key types of laxatives: bulk laxatives, stimulant laxatives, osmotic laxatives, stool softeners, and lubricant laxatives.
Bulk-forming laxatives, such as psyllium, methylcellulose, and polycarbophil, absorb water in the intestine, increasing stool bulk and promoting bowel movement. This makes...
Bulk-forming laxatives, such as psyllium, methylcellulose, and polycarbophil, absorb water in the intestine, increasing stool bulk and promoting bowel movement. This makes...
01:20Drugs Affecting GI Tract Motility: Other Laxatives
Laxatives are primarily used to alleviate constipation, a common gastrointestinal disorder characterized by infrequent bowel movements and difficulty passing stools. They work by various mechanisms to increase the volume or frequency of bowel movements. The primary modes of action of laxatives include increasing stool bulk, softening the stool, stimulating intestinal motility, and osmotically drawing water into the intestines.
Osmotic or saline laxatives, like magnesium hydroxide or milk of...
Osmotic or saline laxatives, like magnesium hydroxide or milk of...
01:20Drugs Affecting GI Tract Motility: Adsorbents as Antidiarrheal Agents
Diarrhea is characterized by the occurrence of frequent, watery bowel movements. Various factors can trigger diarrhea, including viral or bacterial infections, foodborne illnesses, side effects from certain medications, and underlying digestive disorders. If not adequately managed, diarrhea can lead to complications such as dehydration, electrolyte imbalances, and nutrient deficiencies. Severe diarrhea can lead to significant weight loss, malnutrition, and weakened immune function.
Adsorbents...
Adsorbents...
01:21Drugs for Treatment of Constipation-Predominant IBS
Pharmacological therapies for IBS-C are designed to alleviate abdominal discomfort and enhance bowel function. In patients with IBS-C, fiber supplements may help soften stools and decrease straining, but may also lead to increased gas production and bloating. Osmotic laxatives like milk of magnesia are frequently used to soften stools and increase stool frequency in IBS-C patients. In addition, two drugs approved for use in severe IBS-C adult cases are linaclotide (Linzess) and lubiprostone...
01:25Assessment of the Rectum and Anus
Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
01:23Factors Affecting Dissolution: Particle Size and Effective Surface Area
Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are employed to...