Related Experiment Video
Updated: Mar 24, 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
10.6K
Low calorie sweeteners and gut microbiota
Kristian Daly1, Alistair C Darby1, Soraya P Shirazi-Beechey1
1Department of Functional and Comparative Genomics, Institute of Integrative Biology, University of Liverpool, Liverpool L69 7ZB, UK.
Physiology & Behavior
|March 20, 2016
Summary
Low calorie sweeteners (LCS) may impact gut bacteria, but studies show mixed results. Understanding the molecular mechanisms is key to making science-based recommendations on LCS and gut health.
Area of Science:
- Microbiology
- Nutrition Science
- Gastroenterology
Background:
- Early studies (1980s) linked low calorie sweeteners (LCS) to gut microbiota alterations.
- Recent research presents conflicting findings regarding LCS effects on gut bacteria.
- Fecal samples may not accurately represent the proximal intestinal microbiome or short-chain fatty acid production.
Purpose of the Study:
- To investigate the molecular mechanisms of low calorie sweetener (LCS) interactions with gut microbiota.
- To provide a scientifically-based approach for evaluating LCS effects on the host via gut microbiota.
- To address controversies surrounding LCS and gut microbiome research.
Main Methods:
- Utilized an exemplar study design to determine molecular mechanisms.
- Focused on precise modes of action of LCS on gut microbiota.
- Emphasized the importance of direct mechanistic investigation over indirect measures.
Main Results:
- Demonstrated that elucidating molecular mechanisms is feasible.
- Provided a pathway for scientifically-grounded recommendations.
- Highlighted limitations of fecal sample analysis for gut microbiome studies.
Conclusions:
- Understanding the precise molecular mechanisms of LCS action on gut microbiota is crucial.
- This approach enables rational, evidence-based recommendations for LCS consumption.
- Future research should prioritize mechanistic studies for accurate assessment of LCS impact.
More Related Videos
Related Concept Videos
01:18Functions of the Gut Microbiota
5
The gut microbiota includes trillions of microorganisms that colonize the human gastrointestinal tract, including bacteria, archaea, viruses, and fungi. This complex ecosystem plays a critical role in maintaining intestinal and systemic health. Most of these microbes inhabit the large intestine, establishing a relatively stable and diverse community that contributes to gut homeostasis through various metabolic, immunological, and protective mechanisms.Dominant bacterial phyla, such as...
5
01:27Microbiota of the Large Intestine
3
The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
3
01:27Microbiota of the Stomach and Small Intestine
8
The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
8
01:22Probiotics
50
Probiotics are live, non-pathogenic microorganisms that confer health benefits by modulating the gut microbiota. The human gastrointestinal tract harbors a complex microbial ecosystem, and the balance of this microbiota is crucial for digestive and systemic health. Among the most extensively studied and utilized probiotics are species formerly classified within the genera Lactobacillus and Bifidobacterium. These organisms not only naturally colonize the human gut but are also consumed through...
50
01:19Oral Hypoglycemic Agents: α-Glucosidase Inhibitors
841
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.
Acarbose and miglitol are...
Acarbose and miglitol are...
841
01:27The Oral Microbiota
9
The oral microbiome includes a complex ecosystem comprising over 700 microbial species, identified through genomic sequencing and culture-based analyses to date. This community includes a core microbiome, found universally among individuals, and a variable component influenced by environmental factors such as diet, lifestyle, and host genetics. Site-specific conditions, including oxygen gradients, pH levels, and nutrient availability, determine the spatial distribution of these microorganisms...
9