In Vitro Glycemic Index Determination Using Enzymatic Digestion
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Solution Overview
Problem
Current in vitro methods for determining glycemic index values are inaccurate and lack precision, particularly when compared to traditional in vivo methods, and are not suitable for a wide variety of food products, including solid, semi-solid, and liquid foods.
Innovation Solution
An in vitro analytical method that involves determining the protein and fat content of food products, simulating digestion with enzymes, and using high-performance liquid chromatography to measure glucose and sugar alcohols, with a predictive equation derived from multivariate analysis to calculate glycemic index values, allowing for the analysis of a range of food types with improved accuracy and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If in vivo methods are used to determine glycemic index, then measurement precision is improved, but loss of time and cost increase
Solution Approach 1:
The patent replaces the biological/in vivo testing system with a chemical in vitro enzymatic digestion system. Instead of measuring blood glucose responses in human subjects, the method uses controlled enzymatic hydrolysis of carbohydrates in a laboratory setting, substituting biological measurement with chemical analysis to achieve faster, more scalable results
Solution Approach 2:
The patent creates a simplified model system that copies the essential function of human digestion (carbohydrate breakdown) using a panel of digestive enzymes. This model reproduces the key physiological process without requiring actual human subjects, enabling rapid prediction of glycemic index through measurement of glucose release in the simulated digestion system
2Measurement precision
If in vivo methods are used to determine glycemic index, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent replaces expensive in vivo human subject testing with cost-effective in vitro enzymatic digestion. The laboratory-based chemical analysis using standard laboratory equipment and reagents is significantly less expensive than recruiting, monitoring, and analyzing human subjects, while providing comparable predictive accuracy for glycemic index
Solution Approach 2:
The patent uses a simplified laboratory model that copies the digestive process without requiring human participants. The enzymatic digestion system uses small amounts of standardized enzymes and food samples, eliminating the need for costly human subject recruitment, ethical review, and clinical monitoring infrastructure
3Productivity
If traditional in vitro methods are used, then productivity is improved, but measurement precision deteriorates
Solution Approach 1:
The patent modifies the parameters of the in vitro test system by using a standardized panel of digestive enzymes with controlled activity levels, specific incubation conditions (temperature, pH, time), and defined carbohydrate substrates. These controlled parameter changes enable both high throughput analysis and precise measurement of glucose release, achieving correlation with in vivo glycemic index values
Solution Approach 2:
The patent develops a universal in vitro test system that can analyze multiple types of food products (grains, legumes, vegetables, fruits, beverages) using the same enzymatic digestion protocol. This multi-functional approach allows the laboratory to handle diverse sample types with a single standardized method, improving productivity while maintaining precision through consistent analytical conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables the determination of glycemic index values with high correlation to traditional in vivo methods, is cost-effective, and can analyze up to 15 food samples per day, providing accurate and precise results for a variety of food products, including solids, semi-solids, and liquids.
Implementation Method 1
digesting an amount of the test food sample... with a mixture of digestive enzymes
Implementation Method 2
using high-performance liquid chromatography to measure glucose and sugar alcohols
Data Source
AI summary
The present invention provides an in vitro method for determining the glycemic index values for various food products. The present invention provides an accurate and inexpensive in vitro method for determining the glycemic index of a wide variety of both food ingredients and finished food products.