Cited by 45Proteins in Food SystemsAlgal biology and biofuel productionSeaweed-derived Bioactive Compounds

Unlocking the functional and nutritional potential of microalgae proteins in food systems: a narrative review

Open access
Prates, José A. M.·2025·Foods

Abstract

As the global demand for sustainable, nutrient-rich protein sources intensifies, microalgae have emerged as a promising alternative due to their unique biochemical, environmental, and functional properties. This narrative review synthesises the nutritional value, protein composition, functional behaviour, processing technologies, and food applications of microalgae proteins. A literature search was conducted using PubMed, Scopus, and Web of Science, with keywords including “microalgae proteins”, “nutritional value”, “functional properties”, and “alternative protein sources”. Priority was given to peer-reviewed articles from the past decade that addressed nutritional quality, extraction methods, and food applications. Key species, Spirulina, Chlorella, Nannochloropsis, and Haematococcus, are highlighted for their high protein content (up to 70% dry weight), complete amino acid profiles, and rich bioactive compound content. Microalgae proteins show excellent solubility, emulsification, gelation, and foaming abilities, enabling use in dairy alternatives, baked goods, snacks, and 3D-printed foods. Advances in extraction, purification, and protein modification have improved their functionality, while cultivation on non-arable land and integration into circular biorefineries enhance sustainability. Remaining challenges include scalability, sensory optimisation, and regulatory clarity. Future studies should focus on improving sensory acceptance, optimising cost-effective processing, and expanding consumer awareness. Overall, microalgae proteins offer a robust and eco-efficient solution to meet global nutrition and sustainability goals.

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  • Microalgae proteins promote clean production and mitigate the use of artificial emulsifiers and stabilizers.

    “Furthermore, microalgae proteins promote clean production and mitigate the use of artificial emulsifiers and stabilizers (Prates, 2025).”

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  1. [35]Wietrzynski W. Rubisco Biogenesis and Assembly in Chlamydomonas Reinhardtii Doctoral Dissertation Université Pierre et Marie Curie Paris, France 2017

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Authors
Prates, J. A. M.
Affiliations
University of Lisbon (PT)
Corresponding author
Prates, José A. M.
Venue
Foods
Publisher
MDPI AG
Published
2025-04-26
Volume
14
Issue
9
Pages
1524
ISSN
2304-8158 (ISSN-L)
OpenAlex
W4409895219
Cited by
45
References
92
Citations by year
2026: 29 · 2025: 16
FWCI
3.67
Type
journal article
Language
en
Open access
Locations
  • Foods (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Fundação para a Ciência e a Tecnologia grants (Lisbon, Portugal) (UIDB/00276/2020, LA/P/0059/2020)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Proteins in Food Systems
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
Keywords
microalgal proteins, alternative protein sources, Spirulina, Chlorella, Nannochloropsis, Haematococcus, protein extraction, protein functional properties, emulsification, gelation, foaming, dairy alternatives, 3D-printed food, biorefinery, sustainable food systems, amino acid composition, sensory acceptability

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