Related Experiment Video
Updated: Jun 27, 2026
07:42
Green Synthesis, Characterization, Encapsulation, and Measurement of the Release Potential of Novel Alkali Lignin Micro-/Submicron Particles
Published on: March 1, 2024
Bioavailability of lignans in human subjects
Thomas Clavel1, Joël Doré, Michael Blaut
1Unit of Ecology and Physiology of the Digestive Tract, National Institute for Research in Agriculture, Jouy-en-Josas, France.
Nutrition Research Reviews
|December 17, 2008
Summary
Dietary lignans, plant compounds, impact health. Understanding their absorption and conversion by gut bacteria into enterolignans is key to their biological effects.
Area of Science:
- Nutritional Science
- Microbiology
- Endocrinology
Background:
- Dietary lignans are plant-derived phytoestrogens with potential health benefits.
- Lignan bioavailability is critical for understanding their biological activity in humans.
- Gut microbiota significantly influences lignan metabolism, producing active enterolignans.
Purpose of the Study:
- To review the current understanding of dietary lignan bioavailability.
- To highlight the role of intestinal bacteria in lignan conversion.
- To emphasize recent findings from bacteriological studies on enterolignan production.
Main Methods:
- Literature review focusing on studies of lignan bioavailability.
- Analysis of research on the metabolism, absorption, and excretion of lignans.
- Inclusion of data from recent bacteriological studies on gut microbiota and lignan conversion.
Main Results:
- Lignan bioavailability is significantly affected by host metabolism, absorption, and excretion processes.
- Intestinal bacteria are essential for converting dietary lignans into biologically active enterodiol and enterolactone.
- Recent bacteriological research provides crucial insights into these conversion pathways.
Conclusions:
- Understanding lignan bioavailability is vital for assessing their health impacts.
- The role of gut microbiota in producing enterolignans is a key determinant of lignan efficacy.
- Further research into the interaction between diet, gut bacteria, and lignan metabolism is warranted.
Related Concept Videos
01:15Bioavailability Study Design: Healthy Subjects Versus Patients
Bioavailability studies are essential for evaluating a drug's therapeutic efficacy and understanding its absorption patterns under various physiological conditions. Conducting such studies on target patient populations provides more relevant data by simulating real-world disease states. However, practical challenges often necessitate the use of young, healthy adult volunteers as study subjects.Patients may exhibit altered drug absorption patterns due to the effects of the disease itself,...
01:22Bioavailability: Influencing Factors
Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
01:27Bioavailability Study Design: Absolute Versus Relative Bioavailability
Bioavailability is a crucial pharmacokinetic parameter that quantifies the proportion of an administered drug that reaches the systemic circulation and is available for therapeutic action. Regulatory agencies mandate the assessment of bioavailability, typically measured as the area under the drug plasma concentration-versus-time curve (AUC), to ensure the efficacy and safety of pharmaceutical products. These evaluations are categorized as absolute and relative bioavailability studies.Absolute...
01:13Bioavailability: Overview
Bioavailability refers to the proportion of an unaltered drug that, after administration, enters the systemic circulation and can be distributed to the desired action site. Factors such as gastrointestinal (GI) absorption and liver biotransformation influence the bioavailability of a drug when it is administered orally. When a drug is administered intravenously, it enters the systemic circulation directly; by definition, its bioavailability is assumed to be 100%. The bioavailability of an...
01:17Bioavailability: Overview
Bioavailability refers to the proportion of an administered drug that reaches the systemic circulation in its active, unaltered form. It is a crucial pharmacokinetic parameter that determines the effectiveness of a drug in achieving its intended therapeutic outcomes. The route of administration significantly influences bioavailability, with intravenous administration achieving 100% bioavailability as the drug directly enters the bloodstream. In contrast, oral administration often results in...
01:20Measurement of Bioavailability: Pharmacodynamic Methods
Pharmacodynamic methods provide insights into a drug's effects on physiological processes over time and play a crucial role in understanding bioavailability and therapeutic efficacy. These methods can be broadly classified into acute pharmacological and therapeutic response approaches, each with distinct mechanisms and applications.The acute pharmacological response method directly correlates a drug's physiological effects, such as ECG or pupil diameter changes, to its time course in the body.