Mineral-Protein Complex for Iron Fortification
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Solution Overview
Problem
Current methods for iron fortification in food products, especially liquid and semi-solid formats like milk, face challenges such as instability and reduced bioavailability due to reactivity with food components, making it difficult to achieve physiologically relevant levels of bioavailable iron without undesirable taste or color changes.
Innovation Solution
The development of mineral-protein complexes using a milk source with a low calcium content, allowing for higher iron loading and improved solubility and heat stability, where the protein-to-calcium ratio is increased to facilitate binding of minerals like iron, preventing precipitation and maintaining bioavailability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional iron fortificants (ferrous sulphate or elemental iron) are used, then iron content can be increased, but product stability deteriorates due to reactivity with food components
Solution Approach 1:
The patent uses milk proteins (caseins) as intermediary carriers to bind iron. The protein acts as a mediator between the iron fortificant and the food matrix, preventing direct harmful interactions while maintaining iron bioavailability. This resolves the contradiction by allowing high iron content without compromising product stability.
Solution Approach 2:
The invention creates composite mineral-protein complexes where iron is bound to milk proteins. This composite structure combines the iron content needed for fortification with the stabilizing properties of proteins, simultaneously achieving both high iron content and product stability.
2Reliability
If soluble iron sources are used to improve bioavailability, then iron absorption is enhanced, but reactivity with milk constituents increases causing unpalatable products
Solution Approach 1:
Milk proteins serve as intermediaries that bind soluble iron sources, maintaining their bioavailability while preventing direct reactions with other milk constituents. The protein-iron complex preserves iron solubility and absorption characteristics while eliminating harmful side reactions that cause unpalatable taste and appearance changes.
3Quantity of substance
If iron is added to milk and dairy products, then nutritional value is enhanced, but reactivity with caseins, fat and calcium decreases bioavailability
Solution Approach 1:
The patent employs milk proteins as intermediary carriers for iron. This intermediary approach allows iron to be added to milk products for nutritional enhancement while the protein binding prevents direct interactions with caseins, fat, and calcium that would otherwise reduce bioavailability. The result is both high nutritional value and maintained bioavailability.
4Quantity of substance
If ferric salts are used for fortification, then iron content is increased, but precipitation occurs at pH >3 making iron unavailable for absorption
Solution Approach 1:
Milk proteins act as intermediaries that bind ferric iron salts, preventing their precipitation at intestinal pH levels. The protein-iron complex keeps iron in a soluble, absorbable form throughout the digestive tract, resolving the contradiction between achieving high iron content through ferric salts and maintaining absorption availability.
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 approach enables the creation of stable, bioavailable iron complexes that can be used in a wider range of food and beverage products, including liquids, without affecting shelf stability or taste, and allows for higher mineral loading, addressing the limitations of previous fortification methods.
Implementation Method 1
The complex includes a mineral and a milk protein wherein the milk protein binds to the mineral through coordination bonds
Implementation Method 2
The complex is soluble at a physiological pH between 6.6 and 6.9
Data Source
AI summary
A non-micellar mineral-protein complex including an exogenously added mineral and a protein, where the mineral-protein complex is soluble in a solution at a physiological pH between 6.6 to 6.9 and the complex includes exogenous phosphorus.