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Related Concept Videos

Methods for Studying Drug Absorption: In situ01:09

Methods for Studying Drug Absorption: In situ

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In situ experiments, such as the Doluisio method and Single-Pass Perfusion technique, provide critical insights into drug uptake by simulating in vivo conditions for drug absorption.
The Doluisio method involves perfusing a prepared segment of a rat's small intestine with a solution of radiolabeled drug and a non-absorbable marker. This helps to differentiate between absorbed and non-absorbed drug concentrations. The intestinal segment is connected at both ends using tubing and syringes,...
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Methods for Studying Drug Absorption: In vitro01:16

Methods for Studying Drug Absorption: In vitro

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In vitro experiments are crucial for understanding the transport and absorption of drugs through biological materials. These studies employ varied methods such as the diffusion cell method, the everted sac technique, and the everted ring technique.
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
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Modified-Release Drug Delivery Systems: Bioavailability01:30

Modified-Release Drug Delivery Systems: Bioavailability

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Modified-release (MR) dosage forms are designed to extend drug release over time, thereby maintaining stable plasma concentrations and reducing dosing frequency. However, their bioavailability is typically below 100% due to incomplete drug release and presystemic metabolism, and limitations in drug permeability across the gastrointestinal epithelium, all of which can restrict the fraction of the drug reaching systemic circulation. Consequently, studying the in vivo bioavailability of MR...
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Drug Absorption: Factors Affecting GI Absorption01:19

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The process of oral drug absorption can be influenced by several factors. Weakly acidic drugs tend to be absorbed more readily from the stomach due to their nonionized state. However, absorption may be less efficient in the upper intestine, where drugs are often ionized. Interestingly, despite the stomach's apparent advantage for drug absorption, its mucous layer can hinder diffusion. Its surface area is also smaller than the intestine's, which can further slow down the absorption rate.
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Bioavailability Study Design: Absolute Versus Relative Bioavailability01:27

Bioavailability Study Design: Absolute Versus Relative Bioavailability

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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...
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Factors Influencing Drug Absorption: Anatomical Parameters01:23

Factors Influencing Drug Absorption: Anatomical Parameters

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Drug absorption involves the movement of drugs from the point of administration into the systemic circulation. Initially, Gastrointestinal (GI) motility propels the drug through the digestive tract and into the stomach. However, the stomach's high acidity and limited surface area restrict its role in drug absorption for most drugs. The drug then moves from the stomach to the small intestine via gastric emptying, which can be slowed by various factors, including interactions with other...
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Updated: May 3, 2026

Solubility of Hydrophobic Compounds in Aqueous Solution Using Combinations of Self-assembling Peptide and Amino Acid
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Comparative absorption of curcumin formulations.

Ralf Jäger1, Ryan P Lowery, Allison V Calvanese

  • 1Increnovo LLC, 2138 E Lafayette Pl, Milwaukee, WI 53202, USA. ralf.jaeger@increnovo.com.

Nutrition Journal
|January 28, 2014
PubMed
Summary
This summary is machine-generated.

A novel curcumin formulation significantly enhances curcuminoid absorption in the blood. This formulation, combining a hydrophilic carrier, cellulosic derivatives, and antioxidants, offers superior bioavailability compared to other tested curcumin products.

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Area of Science:

  • Pharmacokinetics and bioavailability studies
  • Natural product chemistry and drug delivery

Background:

  • Curcumin's therapeutic potential is hindered by poor solubility, low absorption, and rapid metabolism.
  • Effective delivery systems are crucial to overcome curcumin's pharmacokinetic limitations.

Purpose of the Study:

  • To comparatively measure curcuminoid and metabolite levels after oral administration of three distinct curcumin formulations versus a standard.
  • To evaluate the in vivo absorption of curcumin phytosome (CP), curcumin with volatile oils (CTR), and a novel carrier-based formulation (CHC).

Main Methods:

  • A randomized, double-blind, crossover human study involving healthy volunteers.
  • Comparison of three curcumin formulations (CP, CTR, CHC) against a standardized curcumin mixture (CS).
  • Quantification of curcuminoids and tetrahydrocurcumin using High-Performance Liquid Chromatography-Mass Spectrometry/Mass Spectrometry (HPLC-MS/MS).

Main Results:

  • Total curcuminoid blood levels were 1.3-fold higher for CTR and 7.9-fold higher for CP versus CS.
  • The CHC formulation demonstrated a remarkable 45.9-fold increase in absorption compared to CS.
  • CHC significantly outperformed CP (5.8-fold) and CTR (34.9-fold) in enhancing curcuminoid appearance (p < 0.001).

Conclusions:

  • A curcumin formulation with hydrophilic carrier, cellulosic derivatives, and antioxidants significantly boosts blood curcuminoid levels.
  • This novel CHC formulation offers superior bioavailability compared to unformulated curcumin, CP, and CTR.
  • Enhanced curcumin absorption via the CHC formulation may improve therapeutic efficacy.