Are eggs safe to eat? (benefits of eggs)
By
Dr Fernanda Papa Spada (PhD)
| Reviewed by
Dr Anny Manrich (PhD)
The contents of this article are fact-based except otherwise stated within the article.
Author bio
Dr Fernanda Papa Spada (PhD) is a Food Scientist with expertise in Food Technology, eggs, meat, fruits, vegetable, and volatile compounds. She writes and reviews content on these topics.
Dr Spada’s Highlights:
Research at the University of São Paulo
PhD in Food Science and Technology at the University of São Paulo/ Brazil and six-month visitor Recherche at Reading University/ United Kingdom.
Bachelor of Food Science at the University of São Paulo/ Brazil and a one-year scholarship at the Agrosup and Institute of Agronomic Research (INRA) Dijon/ France.
The most important qualities that could be presented are determination and persistence. I am always willing to learn and have new goals. I have abilities to work in group, and technical abilities in languages (French and English), and in many computational tools such as data analysis and bio-statistical advanced analysis.
Professional Experience:
Dr Spada is PhD in Food Science and Technology. I have a partnership with the “Flavor center”; at the University of Reading-UK specialising in analysis chromatography olfactometry (GCO) and technical aids for identifying volatile compounds (GCMS and SPE).
Dr Fernanda Spada did her interuniversity exchange graduation (Brazil/France) in Food Science at USP/ESALQ and the Institut National de la Recherche Agronomique (INRA-Dijon). In mid-2010 she returned to USP / ESALQ in 2012 and completed her Master’s in food science and technology, focusing on products with reduced fat and high sensory acceptance from consumer groups at different ages.
Education:
2019 – 2022 Post-doctorate
Faculty of Pharmaceutical Sciences, FCF/USP, Brazil
Knowledge area: Science and Technology of the Food
2013 – 2017 Doctorate Food Science.
Luiz de Queiroz College of Agriculture, ESALQ, Brazil
with Sandwich Doctorate in University of Reading
Title: Roasted jackfruit seed as a potential substitute for chocolate aroma: obtainment, composition, olfactometry, and application, Year of degree: 2017
2011 – 2013 Masters in Food Science.
Luiz de Queiroz College of Agriculture, ESALQ, Brazil
Title: Reducing fat levels in mortadella bologna and its sensory influence on tasters of different ages, Year of Degree: 2013
2005 – 2010 Undergraduate in Food Science.
Luiz de Queiroz College of Agriculture, ESALQ/USP, Brazil
Title: Analysis of the water-soluble fraction in human milk and its impact on infants’ taste preferences.
Relevant Published Work:
Articles Published in Scientific Journals
- SPADA, F. P.; LAZARINI, J. G.; BATISTA, P. S.; SARTORI, A. G. O.; SALIBA, A. S. M. C.; AMARAL, J. E. P. G.; PURGATTO, E.; ALENCAR, S. M.
Cocoa powder and fermented jackfruit seed flour: a comparative cell-based study on their potential antioxidant and anti-inflammatory activities after simulated gastrointestinal digestion. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE. Impact factor (2021 JCR): 4,1250, v.xx, p.10.1002/jsfa.12, 2023.
Home page: [https://onlinelibrary.wiley.com/doi/epdf/10.1002/jsfa.12568]
- SPADA, FERNANDA PAPA; DE ALENCAR, SEVERINO MATIAS; PURGATTO, EDUARDO
Comprehensive chocolate aroma characterization in beverages containing jackfruit seed flours and cocoa powder. Future Foods., v.6, p.100158, 2022.
Home page: [https://www.sciencedirect.com/science/article/pii/S2666833522000466]
- GIOVANINI DE OLIVEIRA SARTORI, ALAN; PAPA SPADA, FERNANDA; PENA RIBEIRO, VICTOR; ROSALEN, PEDRO LUIZ; IKEGAKI, MASAHARU; KENUPP BASTOS, JAIRO; DE ALENCAR, SEVERINO MATIAS. An insight into the botanical origins of propolis from permanent preservation and reforestation areas of southern Brazil. Scientific Reports. Impact factor (2021 JCR): 4,9960, v.11, p.22043 (2021), 2021.
Home page: [https://doi.org/10.1038/s41598-021-01709-1]
- SPADA, FERNANDA PAPA; BALAGIANNIS, DIMITRIOS P.; PURGATTO, EDUARDO; DO ALENCAR, SEVERINO MATIAS; CANNIATTI-BRAZACA, SOLANGE GUIDOLIN; PARKER, JANE K. Characterisation of the chocolate aroma in roast jackfruit seeds. FOOD CHEMISTRY. Impact factor (2021 JCR): 9,2310, v.354, p.129537, 2021.
Home page: [https://www.sciencedirect.com/science/article/abs/pii/S0308814621005434]
- SPADA, F. P.; MANDRO, GABRIELA FERNANDA; DA MATTA, MANOEL DIVINO; CANNIATTI-BRAZACA, S. G. Functional properties and sensory aroma of roasted jackfruit seed flours compared to cocoa and commercial chocolate powder. Food Bioscience. Impact factor (2021 JCR): 5,3180, v.37, p.100683, 2020.
Home page: [https://www.sciencedirect.com/science/article/pii/S2212429220310208]
- SPADA, F. P.; SILVA, P. P. M.; MANDRO, G. F.; MARGIOTTA, G. B.; SPOTO, M. H. F.; BRAZACA, S. G. C. Physicochemical characteristics and high sensory acceptability in cappuccinos made with jackfruit seeds replacing cocoa powder. PLoS One. Impact factor (2021 JCR): 3,7520, v.13, p.e0197654, 2018.
Home page: [https://doi.org/10.1371/journal.pone.0197654] or
[https://journals.plos.org/plosone/article/authors?id=10.1371/journal.pone.0197654]
- SPADA, FERNANDA PAPA; ZERBETO, LAIS MASSON; RAGAZI, GABRIEL BERNARDES CABREIRA; GUTIERREZ, ÉRIKA MARIA ROEL; DE SOUZA, MIRIAM COELHO; PARKER, JANE K.; CANNIATTI BRAZACA, SOLANGE GUIDOLIN. Optimization of Chocolate Aroma Production in Roasted Jackfruit Seeds. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY. Impact factor (2021 JCR): 5,8950, v.21, p.2017 – 1208, 2017.
Home page: [ http://pubs.acs.org/doi/abs/10.1021/acs.jafc.6b04836]
- SELANI, M.; SHIRADO, G. A. N.; MARGIOTTA, G. B.; SPADA, F. P.; PIEDADE, S. M. S.; CASTILLO, C.J.C.; BRAZACA, S. G. C. Effects of pineapple byproduct and canola oil as fat replacers on physicochemical and sensory qualities of low-fat beef burger. Meat Science. Impact factor (2021 JCR): 7,0770, v.112, p.69 – 76, 2016.
Home page: [http://www.sciencedirect.com/science/article/pii/S0309174015301157]
- SPADA, F. P.; SELANI, M.; COELHO, A.A.D.; SAVINO, V.J.M.; RODELLA, A. A.; SOUZA, M.C.; Fávia Salgado Fischer; LEMES, D. E. A.; Solange Guidolin Canniatti. Influence of natural and synthetic carotenoids on the color of egg yolk. SCIENTIA AGRICOLA. Impact factor (2015 JCR): 0,9540, v.73, p.234 – 242, 2016.
Home page: [https://doi.org/10.1590/0103-9016-2014-0337]
- SALDANA, E.; LEMOS, A. L. C.; SELANI, M.; SPADA, F. P.; ALMEIDA, M. A.; CASTILLO, C.J.C. Influence of animal fat substitution by vegetal fat on Mortadella-type products formulated with different hydrocolloids. SCIENTIA AGRICOLA. Impact factor (2015 JCR): 0,9540, v.72, p.495 – 503, 2015.
Home page:
[http://www.scielo.br/scielo.php?pid=S0103-90162015000600495&script=sci_arttext]
Conference Papers:
- SPADA, FERNANDA PAPA; GIOVANINI DE OLIVEIRA SARTORI, ALAN; ALENCAR, S. M.; PURGATTO, EDUARDO. Brown propolis as an authentical functional ingredient to food industry, 2021. (Symposium, Presentations in Events). Additional references: Canada/English. Home page: http://www.pangbornsymposium.com/; Canada; Vancouver; Pangborn2021; Elsevier.
- SPADA, FERNANDA PAPA; SALIBA, A. S. M. C.; DE ALENCAR, SEVERINO MATIAS; PURGATTO, E. Evaluating the peculiar aroma of Syzygium malaccense, 2021. (Symposium,Presentations in Events). Additional references: China/English. Online; SenseAsia2021; Elsevier.
- SPADA, F. P.; BATISTA, P. S.; PURGATTO, E.; JACOMINO, A. P.; ALENCAR, S. M. Evaluating the peculiar aroma of Eugenia pyriformis Cambess, 2020. (Congress,Presentations in Events). Additional references: Holanda/English. Netherlands – Online; Netherlands; Evento: Eurosense; Elsevier.
- SPADA, F. P.; ALENCAR, S. M.; PURGATTO, E. Production of natural chocolate aroma by jackfruit seeds applied and their application in beverages, 2020. (Congress,Presentations in Events). Additional references: Holanda/English. Netherlands – Online; Netherlands; Eurosense; Elsevier.
- SPADA, FERNANDA PAPA. The use of jackfruit seeds as a chocolate aroma in food, beverages and make-be products., 2020. (Conference or lecture, Presentations in Events). Additional references: Great Britain/English. England; London; 29th World Conference on Food and Beverages; Food Tec Conferences.
- SPADA, F. P.; METHVEN, L.; Solange Guidolin Canniatti; PARKER, J. K. Jackfruit seed as a potential substitute for chocolate aroma, 2015. (Congress,Presentations in Events). Additional references: Great Britain /English. Home page: https://www.northumbria.ac.uk/about-us/news-events/events/2015/07/3rd-nursten-postgraduate-flavour-symposium/; Local: Newcastle; Newcastle; Evento: 3rd Nursten Postgraduate Flavour Symposium; Northumbria University.
Other References:
Reading University -SPADA 2017
https://centaur.reading.ac.uk/68248/1/FINAL%20Paper%20Jack%20I%20-22nd%20Jan%202017.pdf
Confectionery News – SPADA 2017
PubMed SPADA 2023 https://pubmed.ncbi.nlm.nih.gov/36960787/
EUREKALERT – SPADA 2018 – https://www.eurekalert.org/news-releases/506333
LIVEKINDLY – SPADA 2018 – https://www.livekindly.com/chocolatey-aroma-jackfruit-seeds/
DAILY NEWS – SPADA 2018 – http://dailynews.lk/2018/11/05/tc/167435/jackfruit-seed-may-soon-be-substitute-cocoa?page=16
You can view some of Dr. Spada’s research, as well as links to her professional profile:
Reviewer bio
Dr Anny Manrich PhD is a food Engineer with expertise in Food Technology, Natural Polymers, Edible Films, Enzymes, and Nanotechnology. She writes and reviews content on these topics.
Dr Anny Manrich’s Highlights:
- Research and Technology at the Brazilian Agricultural Research Corporation
- PhD in Chemical Engineering with a focus on Biochemistry at the Federal University of Sao Carlos/ Brazil and a one-year scholarship at the Technical University of Munich/ Germany
- Bachelor of Food Engineering at the University of Campinas/ Brazil and a one-year scholarship at the Technical University of Munich/ Germany
“To solve a problem, global vision and multifactorial understanding are necessary. Therefore, in addition to expertise, one should seek multidisciplinary thinking connected with science and reality” – Dr Anny Manrich, PhD.
Professional Experience:
Dr Anny Manrich’s Experience Joining the Brazilian Agricultural Research Corporation, as soon as she completed her doctorate,
Dr Anny Manrich has worked on several projects, including the more than three-year partnership project with BRF, a major food producer in Brazil. As a postdoctoral fellow.
Dr Anny Manrich has also contributed to several business consultancies and research projects of the National Nanotechnology Laboratory System in areas such as food technology, fibres, films and coatings and Nanotechnology; in a very determined way, having a great team relationship, being creative and committed.
Growing concerns about the safe introduction of nanomaterials into today’s life emphasises the need to create regulatory documentation in front of characterising, using and testing them. Dr Anny Manrich worked for two years on a characterization project for nanoscale materials, with the aim of exploring their possible health effects.
Despite not having specific academic training in packaging or polymeric films, Dr Anny Manrich works at the Brazilian Agricultural Research Corporation in areas of edible and biodegradable films produced from agricultural waste and in the development of films with greater resistance to water, having articles published in renowned scientific journals, which demonstrates her multidisciplinary understanding and creativity.
In addition, she worked for four years as a consultant to a food company to develop a line of snacks that are healthy and that add functional ingredients, physiologically active compounds that bring health benefits, made from fruits and vegetables, enabling diet improvement, disease prevention and reduction of nutritional deficiencies.
Dr Anny Manrich participated as a member of the examination board for two Master’s exams and one PhD exam at the Department of Chemical Engineering of the Federal University of São Carlos.
Education:
- 2001 Bachelor in Food Engineering at the State University of Campinas, Brazil
- 1999 One year scholarship at the Technical University of Munich
- 2004 Master in Chemical Engineering at the Federal University of São Carlos, Brazil
- 2012 PhD in Chemical Engineering at the Federal University of São Carlos, Brazil
- 2010 One year scholarship at the Technical University of Munich
The main publications of Dr. Anny Manrich are:
Articles
Manrich, A., Moreira, F. K., Otoni, C. G., Lorevice, M. V., Martins, M. A., & Mattoso, L. H. (2017). Hydrophobic edible films made up of tomato cutin and pectin. Carbohydrate Polymers, 164, 83-91.
Mendes, J. F., Norcino, L. B., Martins, H. H. A., Manrich, A., Otoni, C. G., Carvalho, E. E. N., … & Mattoso, L. H. C. (2020). Correlating emulsion characteristics with the properties of active starch films loaded with lemongrass essential oil. Food Hydrocolloids, 100, 105428.
Norcino, L. B., Mendes, J. F., Natarelli, C. V. L., Manrich, A., Oliveira, J. E., & Mattoso, L. H. C. (2020). Pectin films loaded with copaiba oil nanoemulsions for potential use as bio-based active packaging. Food Hydrocolloids, 106, 105862.
Manrich, Anny, et al. Immobilization of trypsin on chitosan gels: Use of different activation protocols and comparison with other supports. International Journal of Biological Macromolecules 43.1 (2008): 54-61.
Manrich, Anny; Komesu, Andrea ; Adriano, Wellington Sabino; Tardioli, Paulo Waldir ; Giordano, Raquel Lima Camargo . Immobilization and Stabilization of Xylanase by Multipoint Covalent Attachment on Agarose and on Chitosan Supports. Applied Biochemistry and Biotechnology, v. 161, p. 455-467, 2010.
Mendes, J. F., Martins, J. T., Manrich, A., Neto, A. S., Pinheiro, A. C. M., Mattoso, L. H. C., & Martins, M. A. (2019). Development and physical-chemical properties of pectin film reinforced with spent coffee grounds by continuous casting. Carbohydrate polymers, 210, 92-99..
Milessi, T. S., Kopp, W., Rojas, M. J., Manrich, A., Baptista-Neto, A., Tardioli, P. W., … & Giordano, R. L. (2016). Immobilization and stabilization of an endoxylanase from Bacillus subtilis (XynA) for xylooligosaccharides (XOs) production. Catalysis Today, 259, 130-139.
Mendes, J. F., Norcino, L. B., Manrich, A., Pinheiro, A. C. M., Oliveira, J. E., & Mattoso, L. H. C. (2020). Development, physical‐chemical properties, and photodegradation of pectin film reinforced with malt bagasse fibers by continuous casting. Journal of Applied Polymer Science, 137(39), 49178.
Mendes, J. F., Martins, J. T., Manrich, A., Luchesi, B. R., Dantas, A. P. S., Vanderlei, R. M., … & Martins, M. A. (2021). Thermo-physical and mechanical characteristics of composites based on high-density polyethylene (HDPE) e spent coffee grounds (SCG). Journal of Polymers and the Environment, 29, 2888-2900..
Mendes, J. F., Norcino, L. B., Martins, H. H., Manrich, A., Otoni, C. G., Carvalho, E. E. N., … & Mattoso, L. H. C. (2021). Development of quaternary nanocomposites made up of cassava starch, cocoa butter, lemongrass essential oil nanoemulsion, and brewery spent grain fibers. Journal of Food Science, 86(5), 1979-1996.
Manrich, A., Martins, M. A., & Mattoso, L. H. C. (2021). Manufacture and performance of peanut skin cellulose nanocrystals. Scientia Agricola, 79.
Nascimento, V. M., Manrich, A., Tardioli, P. W., de Campos Giordano, R., de Moraes Rocha, G. J., & Giordano, R. D. L. C. (2016). Alkaline pretreatment for practicable production of ethanol and xylooligosaccharides. Bioethanol, 2(1)..
Manrich, Anny, de Oliveira, J. E., Martins, M. A., & Mattoso, L. H. C. Physicochemical and Thermal Characterization of the Spirulina platensis. J. Agric. Sci. Technol. B, v. 10, p. 298-307, 2020.
Book Chapter
Terra, I. A. A., Aoki, P. H., Delezuk, J. A. D. M., Martins, M. A., Manrich, A., Silva, M. J., … & Miranda, P. B. (2022). Técnicas de Caracterização de Polímeros. Nanotecnologia Aplicada a Polímeros, 614.
Conference Papers
Ferreira, L. F., Luvizaro, L. B., Manrich, A., Martins, M. A., Júnior, M. G., & Dias, M. V. (2017). Comparação da estabilidade de suspensões poliméricas de amido/tocoferol e quitosana/tocoferol. In: CONGRESSO BRASILEIRO DE POLÍMEROS, 14., 2017, Águas de Lindóia, SP.
Manrich, A., Hubinger, S. Z., & Paris, E. C. (2017). Citotoxicidade causada por nanomateriais: avaliação do micronúcleo. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 9., 2017, São Carlos. Anais… São Carlos: Embrapa Instrumentação, 2017. p. 655-658.
Manrich, Anny, et al. Immobilization and Stabilization of Xylanase by multipoint covalent attachment on Glyoxyl Agarose Support. The 31st Symposium on Biotechnology for Fuels and Chemicals. 2009.
Manrich, Anny, et al. Application of immobilized xylanase on hydrolysis of soluble wood hemicelluloses after using microwave and organosolv pre-treatments. The 32nd Symposium on Biotechnology for Fuels and Chemicals. 2010.
You can view some of Dr Anny’s work below and links to her professional profile.
Research Gate: https://www.researchgate.net/profile/Anny-Manrich-2
Scopus: https://www.scopus.com/authid/detail.uri?authorId=23103497100
Google Scholar: https://scholar.google.com/citations?hl=en&user=Ea9qpr0AAAAJ
Linkedin: https://br.linkedin.com/in/anny-manrich-20693129
In this short article, we will provide an answer to the question “Are eggs safe to eat” and discuss the nutritional benefits of eggs.
Are eggs safe to eat?
Yes, eggs are safe for consumption. They are safe when produced under favourable bird conditions and undergo proper collection and preservation to maintain shell integrity (1).
Adequate storage is crucial for freshness, as indicated on the packaging. Detecting signs of ageing and spoilage is important, with methods like the water test distinguishing fresh (sinking) from older eggs (floating) (1).
It’s worth noting that even well-stored eggs showing no signs of spoilage carry some risk if expired (2).
While generally safe, cautious attention to freshness and quality is vital when including eggs in your diet.
What nutrients are in eggs aside from cholesterol?
Eggs are a valuable source of animal protein, essential vitamins, minerals, and beneficial compounds like high-quality protein, healthy fats, lutein, zeaxanthin, antioxidants, and choline (3).
They are an affordable and nutrient-rich whole food. With its high biological value, the body efficiently utilizes almost all of the protein found in eggs, making it comparable to breast milk as an exemplary protein source (3).
The bioactive components present in eggs can impact pathways related to both inflammation and anti-inflammation, which are significant in the development of various diseases (3).
Why are eggs considered a healthy addition to a balanced diet? Eggs, being rich in nutrients, are generally easier to digest compared to other protein-rich foods (3).
Overall, egg consumption tends to have a favourable or neutral impact on blood pressure levels in adults (3).
It’s worth noting that scientific evidence confirms the safety of consuming up to 1 whole egg per day for the majority of the population (4).
Therefore, it is advisable to maintain a balanced diet and remember that eggs can be a highly nutritious food choice.
What are the recommended safety guidelines for handling eggs?
The recommended safety guidelines for handling eggs include:
1. Avoid purchasing cracked eggs and inspect them carefully for any dents or cracks (1).
2. Avoid eggs with unusually thin shells, as they have a higher risk of salmonella contamination (5).
3. Consider the consistency of the egg: Fresh eggs have tightly clinging egg white to the bright yolk, while older eggs have separated whites and flattened yolks (1).
4. Rely on the odour of the egg: Fresh eggs emit a mild, agreeable smell, while spoiled eggs release an unpleasant, sulfur-like, or putrid odour (1).
5. Ensure the eggs are thoroughly cooked in dishes or recipes (1 and 5).
What are the risks of eating spoiled eggs?
Consuming expired eggs can pose a risk of various food-borne illnesses, particularly food poisoning. Spoiled eggs may contain bacteria like Salmonella, which can lead to symptoms such as vomiting, diarrhoea, nausea, and abdominal pain (2).
Diarrhoea is the body’s way of indicating the presence of harmful substances. Abdominal pain is often accompanied by vomiting and nausea in cases of food poisoning from expired eggs (2).
Eating expired eggs can also elevate body temperature, causing fever, which is the body’s natural defence mechanism and an indicator that something is wrong (2).
In such cases, seeking appropriate medical assistance is recommended.
When is egg not safe to eat?
Eating eggs can offer numerous nutritional benefits, but there are also potential risks associated with them. Here’s a breakdown of three key risks: allergies, diet considerations, and foodborne diseases.
Allergies: Eggs are one of the common allergenic foods, especially in children. Egg allergies typically result from an immune response to proteins found in egg whites or yolks. Those with egg allergies need to carefully avoid any egg-containing products and be vigilant about ingredient labels (3 and 4).
Diet considerations: Eggs are a source of high-quality protein, healthy fats, vitamins, and minerals. However, dietary risks may arise due to factors such as cholesterol content and individual dietary preferences. Some people limit egg consumption due to concerns about cholesterol, even though current research suggests that moderate egg consumption doesn’t significantly impact blood cholesterol for most individuals (3).
Foodborne Diseases: Eggs are susceptible to contamination by pathogens like Salmonella, which can cause foodborne illnesses. Proper handling and cooking are crucial to mitigate this risk. Consuming raw or undercooked eggs can lead to bacterial infections, causing symptoms like stomach cramps, diarrhoea, vomiting, and fever (2).
Other FAQs about Eggs that you may be interested in.
How many eggs can you eat a day?
Conclusion
In this short article, we provided an answer to the question ‘Can chickens eat eggs?’ Yes, eggs are safe for consumption. Eggs are a valuable source of essential vitamins, minerals, and beneficial compounds like high-quality protein.
