Assessment of Plant-Based Fish Substitutes: A Review of Processing Methods and Product Quality

Jagoda Piatkowska^*, Sandra Troop and Maling Drawd
^*Correspondence: Jagoda Piatkowska, Department of Animal Science, Warsaw University of Life Sciences, Warsaw, Poland, Email:

Keywords

Plant-based fish substitutes • Product quality • Protein • Sustainability

Introduction

The global demand for seafood has been steadily increasing over the years, driven by factors such as population growth, rising disposable incomes, and changing dietary preferences. However, this growing demand has put tremendous pressure on marine ecosystems, leading to concerns over sustainability and the depletion of fish stocks. In addition, ethical and health-related concerns regarding animal welfare and the consumption of fish have emerged, prompting the development of alternative sources of seafood. Plant-based fish substitutes have gained significant attention as sustainable alternatives that can address these concerns while providing consumers with familiar flavors and textures.

Plant-based fish substitutes are products made from plant-based ingredients that mimic the taste, texture, and nutritional composition of fish. These substitutes aim to offer a sustainable and ethical solution to meet the increasing demand for seafood while reducing the reliance on traditional fishing practices. By using plant-based ingredients, such as soy, peas, algae, and seaweed, manufacturers can create products that closely resemble the sensory experience of consuming fish. One of the critical aspects of plantbased fish substitutes is the processing methods employed to achieve desirable textures, flavors, and nutritional profiles. Processing techniques play a crucial role in transforming raw plant materials into finished products that resemble fish in terms of appearance, mouthfeel, and taste. Various methods, such as extrusion, texturization, and encapsulation, have been utilized to develop the characteristic fibrous texture of fish muscle and replicate the flaky structure of fish fillets. These methods help create plant-based alternatives that can be used in a wide range of seafood dishes, including fish burgers, fish sticks, and fish fillet replacements.

In addition to texture, the quality attributes of plant-based fish substitutes are of utmost importance to ensure consumer acceptance and satisfaction. Product quality encompasses sensory characteristics, nutritional composition, and shelf life. Sensory attributes, such as taste, aroma, color, and mouthfeel, play a crucial role in determining the acceptability of plant-based fish substitutes. The products should closely resemble the sensory experience of consuming fish to achieve consumer preference and market success. Nutritional composition is another essential aspect that needs to be considered when developing plant-based fish substitutes. Fish is a rich source of highquality protein, omega-3 fatty acids, vitamins, and minerals [1]. Therefore, plant-based alternatives must be fortified with essential nutrients to match or exceed the nutritional value of fish. Incorporation of omega-3 fatty acids, commonly found in fish, can be achieved through fortification or incorporation of plant sources such as algae and flaxseed.

Shelf life is a critical consideration for any food product, including plantbased fish substitutes. These substitutes need to have a reasonable shelf life to ensure their availability and maintain their quality over time. Factors such as packaging, processing methods, and storage conditions play a significant role in determining the shelf life of these products. Moreover, the stability of nutritional components, such as omega-3 fatty acids, should also be considered to ensure that the substitutes retain their nutritional benefits throughout their shelf life. Despite the progress made in developing plant-based fish substitutes, several challenges persist. Achieving the desired texture that mimics fish muscle remains a significant hurdle. The fibrous structure and flakiness of fish are difficult to replicate using plant-based ingredients. Moreover, offflavors associated with plant sources and processing methods can impact the overall acceptability of the substitutes. Addressing these challenges requires innovative approaches in ingredient selection, processing techniques, and flavor masking methods.

To enhance the product quality of plant-based fish substitutes, continuous research and development efforts are underway. Encapsulation techniques are being explored to improve texture, release flavors, and protect sensitive ingredients. Advanced processing methods, such as high-pressure processing and sous-vide cooking, are being investigated to achieve better texture and taste. Flavor masking technologies are also being employed to overcome offflavors and enhance the palatability of these.

Literature Review

Processing methods for plant-based fish substitutes

The development of plant-based fish substitutes involves various processing methods aimed at achieving desirable textures and flavors. Extrusion, a commonly used technique, involves the application of heat, pressure, and shear forces to transform raw ingredients into a dough-like consistency that can be shaped into different forms. Extrusion enables the creation of fibrous structures resembling fish muscle and facilitates the incorporation of proteins, fibers, and binders to enhance texture and mouthfeel [2]. Texturization techniques, such as high-moisture extrusion and shear cell technology, have also been employed to replicate the flaky texture of fish fillets. High-moisture extrusion involves using water as a plasticizer to produce a gellike texture similar to fish muscle. Shear cell technology utilizes mechanical forces to align and orient plant-based ingredients, creating a layered structure that imitates the characteristic flakiness of fish fillets.

Encapsulation methods have gained attention in the development of plant-based fish substitutes. Encapsulation protects sensitive ingredients, enhances flavor release, and improves the overall sensory experience. Microencapsulation, using materials such as alginate, lipids, or proteins, has been applied to incorporate omega-3 fatty acids, flavors, and bioactive compounds into the substitutes. This approach ensures the stability and controlled release of these components during cooking and digestion.

Product quality assessment

Assessing the quality attributes of plant-based fish substitutes is crucial to meet consumer expectations and ensure market success. Sensory evaluation plays a vital role in determining the acceptability and likeness of substitutes to fish. Panelists evaluate attributes such as taste, aroma, color, texture, and overall preference using various sensory analysis methods [3], including descriptive analysis, consumer testing, and hedonic scales. Understanding consumer preferences and incorporating their feedback is essential for product optimization. Nutritional composition is a key consideration for plant-based fish substitutes. Fish is known for its high-quality protein content and omega-3 fatty acids. Therefore, fortification strategies are employed to enhance the nutritional profile of plant-based substitutes. Incorporation of omega-3 fatty acids from microalgae or flaxseed oil has been successful in achieving a similar fatty acid profile to fish. Additionally, the protein content and quality are improved through the selection and blending of plant protein sources, such as soy, peas, and wheat.

Shelf life is a critical aspect that determines the availability and market viability of plant-based fish substitutes. Packaging materials and techniques are employed to extend the shelf life by preserving product freshness and preventing deterioration. Modified Atmosphere Packaging (MAP) and vacuum packaging are commonly used to minimize oxidative reactions and inhibit microbial growth. Storage conditions, including temperature and humidity, also influence the shelf life of the substitutes and should be optimized to maintain product quality.

Challenges and strategies for improvement

Despite the progress made in developing plant-based fish substitutes, several challenges need to be addressed. Achieving a texture that closely resembles fish muscle remains a significant hurdle. The fibrous structure and flakiness of fish are difficult to replicate using plant-based ingredients. Researchers are exploring novel approaches, such as the incorporation of fibers, proteins, and binders, and the utilization of emerging technologies like 3D printing, to overcome these challenges and achieve a more authentic texture. Off-flavors associated with plant ingredients and processing methods can impact the acceptability of plant-based fish substitutes. Researchers are focusing on flavor masking techniques to mitigate these off-flavors and enhance palatability. The use of natural flavors, encapsulation of flavors, and the combination of ingredients with complementary flavors are being explored to create a more appealing sensory experience.

Discussion

The development of plant-based fish substitutes holds significant promise in addressing sustainability concerns and meeting the growing demand for seafood alternatives. The reviewed literature highlights the importance of processing methods and product quality assessment in the successful creation of plant-based substitutes that closely resemble fish in texture, flavor, and nutritional composition [4,5]. Processing methods such as extrusion, texturization, and encapsulation have been extensively explored to achieve desirable textures and structures in plant-based fish substitutes. Extrusion, in particular, allows for the creation of fibrous textures that mimic fish muscle, enabling the development of products like fish burgers and fish sticks. Texturization techniques, such as high-moisture extrusion and shear cell technology, have been successful in replicating the flaky texture of fish fillets. Encapsulation methods, on the other hand, have been employed to protect sensitive ingredients, control flavor release, and improve overall sensory experience.

The assessment of product quality is essential to ensure consumer acceptance and market success. Sensory evaluation plays a crucial role in determining the likeness of plant-based fish substitutes to their fish counterparts. By employing descriptive analysis, consumer testing, and hedonic scales, manufacturers can gauge consumer preferences and make necessary adjustments to optimize their products [6]. Nutritional composition is another critical aspect, with fortification strategies used to enhance the protein content and omega-3 fatty acid profile of plant-based substitutes. The incorporation of omega-3 fatty acids from microalgae or flaxseed oil has been successful in achieving a similar fatty acid profile to fish, while the selection and blending of plant protein sources have improved the protein content and quality.

Shelf life is a vital consideration for plant-based fish substitutes. Packaging techniques, such as Modified Atmosphere Packaging (MAP) and vacuum packaging, help extend shelf life by minimizing oxidative reactions and inhibiting microbial growth. Proper storage conditions, including temperature and humidity, also play a significant role in maintaining product quality over time. However, challenges remain in the development of plant-based fish substitutes. Achieving a texture that closely resembles fish muscle continues to be a major hurdle. Researchers are actively exploring innovative approaches, such as the incorporation of fibers, proteins, and binders, as well as 3D printing, to overcome these challenges. Off-flavors associated with plant ingredients and processing methods can also impact product acceptability. Flavor masking techniques, including the use of natural flavors and encapsulation, are being explored to mitigate these off-flavors and enhance overall palatability.

Future research should focus on addressing these challenges and further improving the quality of plant-based fish substitutes. Additional advancements in processing methods can lead to even more realistic textures and structures. Ingredient selection should be expanded to include a wider range of plant sources and functional ingredients to enhance nutritional profiles and overall product quality. Furthermore, sustainability considerations should extend beyond the final product, encompassing the entire supply chain, including ingredient sourcing and packaging materials. In conclusion, the reviewed literature highlights the progress made in processing methods and product quality assessment of plant-based fish substitutes. The development of these substitutes offers a sustainable and ethical solution to meet the increasing demand for seafood alternatives. While challenges persist, ongoing research and development efforts are expected to drive further improvements in texture, flavor, and nutritional composition, enhancing the viability and acceptance of plant-based fish substitutes in the market [7].

Conclusion

Plant-based fish substitutes offer a sustainable solution to address environmental and ethical concerns while meeting the demand for seafood alternatives. Processing methods and product quality assessment play vital roles in achieving textures, flavors, and nutritional profiles similar to fish. Challenges remain in replicating fish muscle texture and overcoming off-flavors, but ongoing research aims to overcome these hurdles. Further advancements in processing, ingredient selection, and sustainability considerations are necessary. With continued development, plant-based fish substitutes have the potential to provide a sustainable and diverse food system, meeting consumer demand for seafood alternatives.

Acknowledgement

Not applicable.

Conflict of Interest

There is no conflict of interest by author.

References

1. McCoy, John G., Michael A. Christie, Youngsoo Kim and Robert Brennan, et al. "Chronic sleep restriction impairs spatial memory in rats." Neuroreport 24 (2013): 91.

Google Scholar, Crossref, Indexed at

2. Henry, Brook L., Arpi Minassian, Jared W. Young and Martin P. Paulus, et al. "Cross-species assessments of motor and exploratory behavior related to bipolar disorder." Neurosci Biobehav Rev 34 (2010): 1296-1306.

Google Scholar, Crossref, Indexed at

3. Xu, Ajing, Eiko Sakurai, Atsuo Kuramasu and Jian Zhang, et al. "Roles of hypothalamic subgroup histamine and orexin neurons on behavioural responses to sleep deprivation induced by the treadmill method in adolescent rats." J Pharmacol Sci 114 (2010): 444-453.

Google Scholar, Crossref, Indexed at

4. Ramakrishnan, Uma and Richard G. Coss. "A comparison of the sleeping behaviour of three sympatric primates." Folia Primatol 72 (2001): 51-53.

Google Scholar, Crossref, Indexed at

5. Levenson, Jessica C., Wendy M. Troxel, Amy Begley and Martica Hall, et al. "A quantitative approach to distinguishing older adults with insomnia from good sleeper controls." J Clin Sleep Med 9 (2013): 125-131.

Google Scholar, Crossref, Indexed at

6. Liu, Yong, Janet B. Croft, Anne G. Wheaton and Geraldine S. Perry, et al. "Association between perceived insufficient sleep, frequent mental distress, obesity and chronic diseases among us adults, 2009 behavioral risk factor surveillance system." BMC Public Health 13 (2013): 1-8.

Google Scholar, Crossref, Indexed at

7. Kumar, Tankesh and Sushil K. Jha. "Sleep deprivation impairs consolidation of cued fear memory in rats." (2012): e47042.

Google Scholar, Crossref, Indexed at