Cited by 203Seaweed-derived Bioactive CompoundsFood and Agricultural SciencesSeed and Plant Biochemistry

Microalgae as Functional Ingredients in Savory Food Products: Application to Wheat Crackers

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Batista, Ana Paula, Niccolai, Alberto, Bursic, Ivana, Sousa, Isabel, Raymundo, Anabela, Rodolfi, Liliana, Biondi, Natascia, Tredici, Mario R.·2019·Foods

Abstract

Crackers are widely consumed snack foods and there is an increasing trend in adding functional ingredients to their composition. In the present work, the dried biomasses of four microalgae strains—Arthrospira platensis F&M-C256, Chlorella vulgaris Allma, Tetraselmis suecica F&M-M33, and Phaeodactylum tricornutum F&M-M40—were used as a source of proteins, antioxidants, and other bioactive molecules in artisanal wheat crackers. Two incorporation levels were tested: 2% (w/w) and 6% (w/w). The impact of microalgae addition was evaluated in terms of physical properties, biochemical composition, antioxidant activity, in vitro digestibility, and sensory characteristics. Microalgae crackers presented stable color and texture throughout eight weeks of storage. Microalgae crackers were slightly thinner and lighter than the control but presented a similar density in agreement with scanning electron microscope images, indicating that gas retention was not greatly affected by microalgae addition. Regarding biochemical composition, 6% A. platensis and C. vulgaris crackers presented a significantly higher protein content (13.2–13.5%), for which they could be claimed to be a “source of protein” according to the Regulation (EC) No. 1924/2006. A. platensis crackers showed the highest antioxidant activity and attained better sensory analysis scores. T. suecica and P. tricornutum crackers showed high phenolic content and antioxidant activity but attained low sensory scores mainly because of their unattractive fishy off-flavor.

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Crossref · 10.3390/foods8120611

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  • Adding certain percentages of spirulina (0%, 5%, 10%, and 15%) to the foods that schoolchildren eat for snacks improved the nutritional content of biscuits and increased fatty acids, such as omega-3, omega-6, omega-7, and omega-9, with omega-6 containing the highest percentage of unsaturated fatty acids, specifically linolenic and γ-linolenic acid, with values of 33.0 and 30.0 mg/g, respectively.

    “On the other hand, research carried out by El Nakib et al. [34] demonstrated that the nutritional content of biscuits might be improved by adding certain percentages of spirulina to the foods that schoolchildren eat for snacks. The percentages tested were 0%, 5%, 10%, and 15%. It also revealed an increase in fatty acids, such as omega-3, omega-6, omega-7, and omega-9, with omega-6 containing the”

    From Trends and Technological Advancements in the Possible Food Applications of Spirulina and Their Health Benefits: A Review. (2022) · cites this paper as [83]

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  • Digestible protein in treated biscuit samples was 11.9 g/100 g, greater than the control sample with 9.8% protein and 7.3 g/100 g digestible protein.

    “The quantity of protein that could be digested in the treated samples was 11.9 g/100 g of biscuits. This proportion is much greater than the one found in the control sample, which had a protein content of 9.8% and a digestible protein content of 7.3 g/100 g of biscuits.”

    From Trends and Technological Advancements in the Possible Food Applications of Spirulina and Their Health Benefits: A Review. (2022) · cites this paper as [83]

    Section 3.7 reports 11.9 g digestible protein per 100 g cracker for the specific 6% A. platensis sample, compared with 7.3 g for the control. Section 3.5 gives the control’s protein content as 9.8%. The claim’s reference to treated samples generally is broader than the result reported for that one formulation. (LLM, conf=0.87)

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  • The biscuit loaded with the spirulina alga A. platensis had the strongest antioxidant activity and received the highest score in the sensory evaluation.

    “As a result, these additions are regarded as a source of protein, since the biscuit that was loaded with the spirulina alga A. platensis had the strongest antioxidant activity and received the highest score in the sensory evaluation [83].”

    From Trends and Technological Advancements in the Possible Food Applications of Spirulina and Their Health Benefits: A Review. (2022) · cites this paper as [83]

    Section 3.6 reports that the 6% A. platensis crackers had the highest antioxidant capacity. Section 3.8 says the 2% A. platensis crackers were preferred among the microalgae crackers for taste, smell, and overall appreciation, but the control scored higher than all microalgae crackers. The claim overstates the sensory result and combines findings from different formulations. (LLM, conf=0.90)

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  • The addition of spirulina by 2% did not give any significant differences in total phenols in biscuits compared to the control sample, as the amount of phenols was 1.4 mg gallic acid/g, while the content of phenolics increased significantly to 1.6-1.7 mg gallic acid/g when spirulina was increased to 6%.

    “In addition, Batista et al. [83] revealed that when estimating the amount of total phenols in biscuits enriched with spirulina algae, the addition of spirulina by 2% did not give any significant differences compared to the control sample, as the amount of phenols was 1.4 mg gallic acid/g, while the content of phenolics increased significantly to 1.6–1.7 mg gallic acid/g when spirulina was increa”

    From Trends and Technological Advancements in the Possible Food Applications of Spirulina and Their Health Benefits: A Review. (2022) · cites this paper as [83]

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  • Numerous minerals (potassium phosphate, potassium sulfate, sodium compounds, phosphorous, calcium, magnesium, iron, EDTA) are required for Spirulina growth and must be present in culture medium.

    “Numerous minerals, including potassium phosphate, potassium sulfate, sodium (sodium carbonate, sodium bicarbonate, sodium nitrate, and sodium chloride), phosphorous (potassium phosphate), calcium (calcium chloride), magnesium (hydrated magnesium sulfate), iron (ferrous sulfate hydrate), and EDTA, are required for the growth of spirulina and must be present in the culture medium [44].”

    From Tendencies Affecting the Growth and Cultivation of Genus Spirulina: An Investigative Review on Current Trends (2022) · cites this paper as [44]

    Section 2.1 (page unavailable) says the spirulina strain was cultivated in Zarrouk medium and washed to remove excess bicarbonate. It does not list the claimed minerals or say that each is required for growth and must be present in the medium. (LLM, conf=0.78)

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Research works printed but not linked: 5

  1. [28]Tredici M.R. Biondi N. Ponis E. Rodolfi L. Chini Zittelli G. New Technologies in Aquaculture: Improving Production Efficiency, Quality and Environmental Management Woodhead Publishing Cambridge, UK 2009 610 676
  2. [46]Zarrouk C. Contribution à l’étude d’une cyanophycée. Influence de divers facteurs physiques et chimiques sur la croissance et la photosynthèse de Spirulina maxima (Setch et Gardner) Geitler Ph.D. Thesis Université de Paris Paris, France 1966
  3. [63]Bourne M.C. Food Texture and Viscosity: Concept and Measurement 2nd ed. Academic Press London, UK 2002 107 291
  4. [72]Abraços L.M.C. Estudo de ingredientes da Salvia sclareoides—Um contributo para o desenvolvimento de um novo suplemento alimentar Master’s Thesis Faculdade de Ciências da Universidade de Lisboa Lisboa, Portugal 2017
  5. [75]Andersen R.A. Handbook of Microalgal Culture: Applied Phycology and Biotechnology 2nd ed. Wiley Oxford, UK 2013 3 20

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Authors
Batista, A. P., Niccolai, A., Bursic, I., Sousa, I., Raymundo, A., Rodolfi, L., Biondi, N., & Tredici, M. R.
Affiliations
  • University of Lisbon (PT)
  • University of Florence (IT)
  • LEAF—Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
Corresponding author
Niccolai, Alberto
Venue
Foods
Publisher
MDPI AG
Published
2019-11-23
Volume
8
Issue
12
Pages
611
ISSN
2304-8158 (ISSN-L)
OpenAlex
W2989853209
Cited by
203
References
60
Citations by year
2026: 23 · 2025: 37 · 2024: 48 · 2023: 38 · 2022: 22 · 2021: 19 · 2020: 16
FWCI
12.70
Type
journal article
Language
en
Open access
Locations
  • Foods (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Florence Research (University of Florence) (submittedVersion, other-oa)
  • Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (submittedVersion, other-oa)
Funders
Fundação para a Ciência e a Tecnologia (UID/AGR/04129/2013)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Seed and Plant Biochemistry
Keywords
microalgae, functional food ingredients, Spirulina platensis, Chlorella vulgaris, Tetraselmis suecica, Phaeodactylum tricornutum, protein content, antioxidant activity, phenolic compounds, in vitro digestibility, sensory evaluation, off-flavor, storage stability

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