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Open research questions in Proteins in Food Systems

555 gap statements mined from Proteins in Food Systems papers in our 7.9M-paper local library, which holds 4,592 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • Lack of methods for the extraction and purification of plant-derived exosome-like nanoparticles. Limited understanding of the physicochemical properties of these nanoparticles.

    Extraction and Characterization of Lemon-derived Exosome-like Nanoparticles (LELNs) using a PEG-6000-Based Method: Comparison of Two Protocols and Evaluation of Physicochemical Properties · 2026 · DOI

  • Mimicking egg functionalities such as emulsification, gelation, and cohesive structure formation remains a challenge. Limited understanding of the effects of phosphate, curdlan, and transglutaminase on plant-based egg omelets. Need for optimized concentrations of these ingredients to achieve desired properties.

    Combined effects of phosphate, curdlan, and transglutaminase on the texture and microstructure of plant-based egg omelets · 2026 · DOI

  • The limited understanding of how the coexistence of ginsenoside and non-ginsenoside constituents affects colloidal organization and interfacial behavior. The need for a systematic study of the interfacial reorganization and functional enhancement of nanoemulsions co-loaded with ginsenoside and non-ginsenoside extracts.

    Interfacial reorganization and functional enhancement of nanoemulsions co-loaded with ginsenoside and non-ginsenoside extracts · 2026 · DOI

  • The lack of studies on the effects of plant-based ingredients on physicochemical quality and microbial safety of plant-based liquid egg alternatives. The need to optimize ingredient combinations and processing strategies to replicate egg-like physicochemical and sensory characteristics. The gap in the literature on the growth behavior of S. Enteritidis in plant-based egg products.

    Effects of plant-based ingredients on physicochemical quality and microbial safety of plant-based liquid egg alternatives · 2026 · DOI

  • The need to improve the retention and delivery characteristics of glutathione.

    Gelatinized-Core and Chitosan-Coated Liposomes: A Stabilized Carrier for Glutathione Delivery · 2026 · DOI

  • The lack of efficient strategies for valorizing edible oil industry by-products into high-quality protein ingredients. The need for sustainable development and reduction of environmental impact in the edible oil industry.

    Valorization of Edible Oil Industry By-Products Through Optimizing the Protein Recovery from Sunflower Press Cake via Different Novel Extraction Methods · 2025 · DOI

  • One challenge is that bovine serum albumin has limited usefulness as a model protein due to its substantial confirmational changes at wine pH. Another challenge is that the surface charge and reactivity of carboxymethyl cellulose need to be stable in the pH range of wine.

    Evaluation of Carboxymethyl Cellulose as an Additive for Selective Protein Removal from Wine · 2025 · DOI

  • The standard method for protein removal from wine has drawbacks and is not the most sustainable practice. There is a need for alternative methods for protein removal from wine. The use of carboxymethyl cellulose as an additive for selective protein removal from wine has not been fully explored.

    Evaluation of Carboxymethyl Cellulose as an Additive for Selective Protein Removal from Wine · 2025 · DOI

  • There is a need to produce probiotic-rich products such as jelly and pudding. The study aims to investigate the properties of fermented gels derived from whey protein mixed with blueberry juice.

    The Effects of Fermentation Time and the Addition of Blueberry on the Texture Properties and In Vitro Digestion of Whey Protein Gel · 2025 · DOI

  • The lack of a novel delivery system for fucoxanthin with high stability and bioavailability. The need for a system that can protect fucoxanthin from degradation during processing and storage.

    Enhancing Fucoxanthin Pickering Emulsion Stability and Encapsulation with Seaweed Cellulose Nanofibrils Using High-Pressure Homogenization · 2025 · DOI

  • Despite extensive studies on their macroscopic properties, the molecular mechanisms driving gelation remain incompletely understood.

    A unified mechanistic perspective on protein–polysaccharide interactions underlying hybrid gel formation: A mini review · 2026 · DOI

  • These observations suggest a negative influence of oat protein aggregates on emulsion apparent stability; however, the underlying mechanisms remain unclear and should be studied further.

    Colloidal state and emulsifying properties of protein isolates from kilned and non-kilned oats · 2026 · DOI

  • The digestibility of plant protein ingredients is influenced by processing, yet the roles of fractionation and post-heat treatment in oat ingredients remain poorly understood.

    Fractionation methods and post-heat treatment shape in vitro protein and starch digestibility of oat protein ingredients · 2026 · DOI

  • Piperlonguminine (PPR), a low-toxicity bioactive alkaloid from Piperis Longi Fructus (a medicinal and food-homologous spice), has not yet been reported to regulate amyloid fibrillation in food proteins.

    Piperlonguminine inhibits hen egg white lysozyme amyloid fibril formation and mitigates amyloid fibril–induced hepatocellular damage · 2026 · DOI

  • However, the distinct contributions of polysaccharide charge and viscosity to emulsion formation, stabilization and meat analog quality remain unclear.

    Roles of polysaccharide charge and viscosity in soy protein–polysaccharide stabilized high internal phase emulsions for plant-based patties · 2026 · DOI

  • There is a paucity of information on research relating to rutin and buckwheat protein (BWP) interactions, particularly regarding the non-covalent bonding of buckwheat protein, which remains underexplored.

    Non-covalent buckwheat protein-rutin complexation for improved functional biopolymer film-forming powder using physical mixing process and dialysis techniques · 2026 · DOI

  • However, the effects of different plasma configurations and operational parameters on soy protein isolate (SPI) remain poorly understood.

    Changing Soy Protein Isolate Techno-Functional Properties via Two Cold Plasma Technologies: DBD and Glow Discharge · 2026 · DOI

  • However, the relationship between their molecular composition, interfacial assembly, and emulsion performance remains inadequately understood.

    Non-covalent Lysine–docosahexaenoic acid amphiphilic complexes as interfacial stabilizers for emulsions and lutein delivery · 2026 · DOI

  • Yet, the complex mechanisms governing fibrous structure formation in plant-protein extrudates are poorly characterised, in turn limiting the rational design and optimisation of the extrusion process.

    Underpinning hierarchical anisotropic structure formation in soy protein high-moisture extrudates by Magnetic Resonance Imaging · 2026 · DOI

  • Future studies employing additional purification steps-such as ultracentrifugation on density gradients, size-exclusion chromatography, or immunoaffinity capture-would be valuable for obtaining more purified vesicle preparations and for systematically evaluating the contribution of co-precipitated contaminants to the observed physicochemical properties - Incorporation of additional confirmatory assays-such…

    Extraction and Characterization of Lemon-derived Exosome-like Nanoparticles (LELNs) using a PEG-6000-Based Method: Comparison of Two Protocols and Evaluation of Physicochemical Properties · 2026 · DOI

  • The study did not investigate the effects of other ingredients on physicochemical quality and microbial safety, - The study only used a limited number of legume proteins and oils, - The study did not evaluate the sensory characteristics…

    Effects of plant-based ingredients on physicochemical quality and microbial safety of plant-based liquid egg alternatives · 2026 · DOI

  • Further in vivo studies are needed to evaluate the bioavailability and safety of the formulation, - The study only investigated the in vitro release properties of the formulations, - The study used simulated gastrointestinal…

    Gelatinized-Core and Chitosan-Coated Liposomes: A Stabilized Carrier for Glutathione Delivery · 2026 · DOI

  • Investigation of other extraction methods for protein recovery from SPC. Optimization of the UMAE and PLE methods for large-scale industrial applications. Examination of the nutritional and functional properties of the extracted proteins.

    Valorization of Edible Oil Industry By-Products Through Optimizing the Protein Recovery from Sunflower Press Cake via Different Novel Extraction Methods · 2025 · DOI

  • Further studies on the application of Pickering emulsions in food and drug systems, - Investigation of the effects of different factors on the stability and bioactivity of fucoxanthin in Pickering emulsions, - Development of new delivery systems for enhanced bioactive compound delivery…

    Enhancing Fucoxanthin Pickering Emulsion Stability and Encapsulation with Seaweed Cellulose Nanofibrils Using High-Pressure Homogenization · 2025 · DOI

  • Employing factorial approaches, - Employing multivariate approaches to further refine formulation performance in plant-based egg…

    Combined effects of phosphate, curdlan, and transglutaminase on the texture and microstructure of plant-based egg omelets · 2026 · DOI

Most-cited papers in Proteins in Food Systems

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Open questions raised by papers listed on this page include: (1) Lack of methods for the extraction and purification of plant-derived exosome-like nanoparticles (“Extraction and Characterization of Lemon-derived Exosome-like Nanoparticles…”, 2026); (2) The lack of studies on the effects of plant-based ingredients on physicochemical quality and microbial safety of plant-based liquid egg alternatives (“Effects of plant-based ingredients on physicochemical quality and microbial…”, 2026); (3) Despite extensive studies on their macroscopic properties, the molecular mechanisms driving gelation remain incompletely understood (“A unified mechanistic perspective on protein–polysaccharide interactions…”, 2026); (4) These observations suggest a negative influence of oat protein aggregates on emulsion apparent stability; however, the underlying mechanisms remain unclear and should be studied further (“Colloidal state and emulsifying properties of protein isolates from kilned and…”, 2026); (5) The digestibility of plant protein ingredients is influenced by processing, yet the roles of fractionation and post-heat treatment in oat ingredients remain poorly understood (“Fractionation methods and post-heat treatment shape in vitro protein and starch…”, 2026). 555 gap statements have been mined from Proteins in Food Systems papers in our 7.9M-paper local library, which holds 4,592 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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