Can castor oil go bad?
By
Dr Tayse Ferreira F. Da Silveira PhD
| Reviewed by
Dr Tayse Ferreira F. Da Silveira PhD
The contents of this article are fact-based except otherwise stated within the article.
Author bio
Dr Tayse has extensive experience in Food Science, especially through studying the chemical composition and stability of foods, as well as their bioactive properties. She writes and reviews content on these topics.
Dr Tayse da Silveira´s Highlights:
- Lecturer at the State University of São Paulo (Unesp), Brazil, for Food Engineering students
- Post-doctorate in Food Science, with a one-year training period at Cirad – France.
- PhD in Food Science, with a one-year scholarship at the University of Reading/United Kingdom.
- Bachelor of Food Engineering at the Federal University of Pará, Brazil.
“Food Science is exciting because it touches our lives in such personal and intimate ways. Understanding food systems and gaining knowledge of how to manipulate them, helps society evolve as a whole” – Dr Tayse da Silveira.
Professional experience:
In her doctorate at the University of Campinas, Dr Tayse studied the effect of emergent preservation techniques, such as high-pressure processing, on the chemical and microbial properties of foods.
After completing her doctorate, Tayse da Silveira worked as a postdoctoral fellow in the Pharmaceutical Science Department at the University of São Paulo (USP), with a one-year training at CIRAD, Montpellier, France.
During this period, Dr Tayse worked on the development and evaluation of innovative antioxidant molecules for the preservation of fatty food products.
Dr Tayse also taught in public and private universities in Brazil for Nutrition, Food Engineering, and Enology students, always on food science and food technology-related subjects, including microbiology, milk technology, and wine-making technology.
She has also been involved in a number of studies evaluating the chemical composition and bioactive properties of food products, with emphasis on the development of analytical techniques to achieve that.
Currently, Dr Tayse works at the Centro de Investigação de Montanha (MRC), Portugal. She continues to work on the study of the chemical composition of foods, with a focus on identifying and isolating molecules with potential for application as food ingredients.
In her research, she targets molecules able to provide health and nutritional improvement, and antioxidant and antimicrobial properties (natural food additives).
She regularly publishes in high-impact, specialized scientific journals in her field, and feels encouraged to expand her knowledge domain by doing new scientific partnerships.
Education
- 2017 – PhD in Food Science at the University of Campinas Brazil, with a one-year training period at the University of Reading/United Kingdom.
- 2013 – Master’s Degree in Food Science at the University of Campinas, Brazil.
- 2011 – Bachelor of Food Engineering at the Federal University of Pará, Brazil.
Relevant Published work
- Roschel GG, da Silveira TFF, Cajaíba LM, Ferrari RA, Castro IA. Combination of natural strategies to improve the oxidative stability of echium seed oil. Journal of Food Science. 2021;86(2):411-9.
- de Moraes MR, da Silveira TFF, Coutinho JP, Souza DS, Duarte MCT, Duarte RT, et al. Bioactivity of atemoya fruits and by-products. Food Bioscience. 2021;41:101036.
- Ferreira da Silveira TF, Laguerre M, Bourlieu-Lacanal C, Lecomte J, Durand E, Figueroa-Espinoza MC, et al. Impact of surfactant concentration and antioxidant mode of incorporation on the oxidative stability of oil-in-water nanoemulsions. LWT. 2021;141:110892.
- da Silveira TFF, Cajaíba LM, Valentin L, Baréa B, Villeneuve P, Castro IA. Effect of sinapic acid ester derivatives on the oxidative stability of omega-3 fatty acids rich oil-in-water emulsions. Food Chemistry. 2020;309:125586.
- Roschel GG, da Silveira TFF, Cajaiba LM, Castro IA. Combination of Hydrophilic or Lipophilic Natural Compounds to Improve the Oxidative Stability of Flaxseed Oil. European Journal of Lipid Science and Technology. 2019;121(5):1800459.
- da Silveira TFF, Cristianini M, Kuhnle GG, Ribeiro AB, Filho JT, Godoy HT. Anthocyanins, non-anthocyanin phenolics, tocopherols and antioxidant capacity of açaí juice (Euterpe oleracea) as affected by high pressure processing and thermal pasteurization. Innovative Food Science & Emerging Technologies. 2019;55:88-96.
- da Silveira TFF, de Souza TCL, Carvalho AV, Ribeiro AB, Kuhnle GGC, Godoy HT. White açaí juice (Euterpe oleracea): Phenolic composition by LC-ESI-MS/MS, antioxidant capacity and inhibition effect on the formation of colorectal cancer related compounds. Journal of Functional Foods. 2017;36:215-23.
You can view some of Dr Tayse´s work below and links to her professional profile:
ResearchGate: https://www.researchgate.net/profile/Tayse-Ferreira?ev=hdr_xprf
Scopus: https://www.scopus.com/authid/detail.uri?authorId=55901968900
Google Scholar: https://scholar.google.com/citations?user=l4zi0d8AAAAJ&hl=pt-PT
Linkedin: https://www.linkedin.com/in/tayse-ferreira-a2311947/
Reviewer bio
Dr Tayse has extensive experience in Food Science, especially through studying the chemical composition and stability of foods, as well as their bioactive properties. She writes and reviews content on these topics.
Dr Tayse da Silveira´s Highlights:
- Lecturer at the State University of São Paulo (Unesp), Brazil, for Food Engineering students
- Post-doctorate in Food Science, with a one-year training period at Cirad – France.
- PhD in Food Science, with a one-year scholarship at the University of Reading/United Kingdom.
- Bachelor of Food Engineering at the Federal University of Pará, Brazil.
“Food Science is exciting because it touches our lives in such personal and intimate ways. Understanding food systems and gaining knowledge of how to manipulate them, helps society evolve as a whole” – Dr Tayse da Silveira.
Professional experience:
In her doctorate at the University of Campinas, Dr Tayse studied the effect of emergent preservation techniques, such as high-pressure processing, on the chemical and microbial properties of foods.
After completing her doctorate, Tayse da Silveira worked as a postdoctoral fellow in the Pharmaceutical Science Department at the University of São Paulo (USP), with a one-year training at CIRAD, Montpellier, France.
During this period, Dr Tayse worked on the development and evaluation of innovative antioxidant molecules for the preservation of fatty food products.
Dr Tayse also taught in public and private universities in Brazil for Nutrition, Food Engineering, and Enology students, always on food science and food technology-related subjects, including microbiology, milk technology, and wine-making technology.
She has also been involved in a number of studies evaluating the chemical composition and bioactive properties of food products, with emphasis on the development of analytical techniques to achieve that.
Currently, Dr Tayse works at the Centro de Investigação de Montanha (MRC), Portugal. She continues to work on the study of the chemical composition of foods, with a focus on identifying and isolating molecules with potential for application as food ingredients.
In her research, she targets molecules able to provide health and nutritional improvement, and antioxidant and antimicrobial properties (natural food additives).
She regularly publishes in high-impact, specialized scientific journals in her field, and feels encouraged to expand her knowledge domain by doing new scientific partnerships.
Education
- 2017 – PhD in Food Science at the University of Campinas Brazil, with a one-year training period at the University of Reading/United Kingdom.
- 2013 – Master’s Degree in Food Science at the University of Campinas, Brazil.
- 2011 – Bachelor of Food Engineering at the Federal University of Pará, Brazil.
Relevant Published work
- Roschel GG, da Silveira TFF, Cajaíba LM, Ferrari RA, Castro IA. Combination of natural strategies to improve the oxidative stability of echium seed oil. Journal of Food Science. 2021;86(2):411-9.
- de Moraes MR, da Silveira TFF, Coutinho JP, Souza DS, Duarte MCT, Duarte RT, et al. Bioactivity of atemoya fruits and by-products. Food Bioscience. 2021;41:101036.
- Ferreira da Silveira TF, Laguerre M, Bourlieu-Lacanal C, Lecomte J, Durand E, Figueroa-Espinoza MC, et al. Impact of surfactant concentration and antioxidant mode of incorporation on the oxidative stability of oil-in-water nanoemulsions. LWT. 2021;141:110892.
- da Silveira TFF, Cajaíba LM, Valentin L, Baréa B, Villeneuve P, Castro IA. Effect of sinapic acid ester derivatives on the oxidative stability of omega-3 fatty acids rich oil-in-water emulsions. Food Chemistry. 2020;309:125586.
- Roschel GG, da Silveira TFF, Cajaiba LM, Castro IA. Combination of Hydrophilic or Lipophilic Natural Compounds to Improve the Oxidative Stability of Flaxseed Oil. European Journal of Lipid Science and Technology. 2019;121(5):1800459.
- da Silveira TFF, Cristianini M, Kuhnle GG, Ribeiro AB, Filho JT, Godoy HT. Anthocyanins, non-anthocyanin phenolics, tocopherols and antioxidant capacity of açaí juice (Euterpe oleracea) as affected by high pressure processing and thermal pasteurization. Innovative Food Science & Emerging Technologies. 2019;55:88-96.
- da Silveira TFF, de Souza TCL, Carvalho AV, Ribeiro AB, Kuhnle GGC, Godoy HT. White açaí juice (Euterpe oleracea): Phenolic composition by LC-ESI-MS/MS, antioxidant capacity and inhibition effect on the formation of colorectal cancer related compounds. Journal of Functional Foods. 2017;36:215-23.
You can view some of Dr Tayse´s work below and links to her professional profile:
ResearchGate: https://www.researchgate.net/profile/Tayse-Ferreira?ev=hdr_xprf
Scopus: https://www.scopus.com/authid/detail.uri?authorId=55901968900
Google Scholar: https://scholar.google.com/citations?user=l4zi0d8AAAAJ&hl=pt-PT
Linkedin: https://www.linkedin.com/in/tayse-ferreira-a2311947/
In this short article, we will answer the query, “Can castor oil go bad?” We will also briefly discuss the shelf life of castor oil and the best practices for storing it.
Can castor oil go bad?
Yes, castor oil does go bad. Like other oils, the main degradation pathway is fat oxidation, which leads to rancidity.
Castor oil can easily oxidize because unsaturated fat predominates in its composition, corresponding to more than 90% of the total fat [1].
Studies have revealed that unsaturated fat can easily undergo oxidation when exposed to air [2].
Fat oxidation is a complex chemical reaction that occurs when fats come into contact with oxygen, leading to the breakdown of the fats and the formation of unwanted compounds.
Fat oxidation gives rise to the appearance of off-flavors and off-odors (rancidity), nutrient losses, and toxic compounds [2].
Light and heat boost oxidation [2], enhancing the production of these undesirable outcomes.
What is the shelf life of castor oil?
An unopened bottle of castor oil has a shelf life of up to one year when properly stored [3].
Actually, castor oil has a best-before date rather than an expiration date. This means that the oil peaks its finest quality by the date printed on labels. Past that date, it may be chemically degraded, especially if incorrectly stored [4].
After being open, the shelf life will depend on the handling practices. The reason is that when you open a bottle of castor oil, it gets exposed to air, which leads to a quality drop over time.
If you store the oil bottle fastened, away from excessive heat and light incidence, it can last the whole shelf life period indicated on the label with minimum oxidation.
What are the signs of deterioration in Castor oil?
Smelling is the best way to know if castor oil has gone bad. Oxidation is easily recognized as randicity.
You can also observe the oil color and consistency, it should be translucid. Turbidity and viscous consistency may indicate extensive oxidation and an oil like that should be immediately discarded.
Can you use castor oil that has expired?
Experts in the area of skincare and health do not recommend ingesting or applying castor oil to the hair, skin, or other parts of the body, especially if you observe any sign of rancidity.
Previous research showed that rancid oils contain free radicals, which are highly reactive molecules capable of harming cell membranes, proteins, and DNA [2].
In addition to free radicals, oxidized oils can also contain toxic compounds derived from the extensive transformation of fatty acids due to oxidation reactions.
According to studies, some of these compounds can be pro-carcinogenic and alter cell functions [2,5].
Moreover, previous research showed that castor oil has minor biological compounds including carotenoid, tocopherol, tocotrienol, phytosterol, and phenolic compounds [1].
Past the best-before date, these beneficial compounds may have been degraded over time, which could reduce the benefits of the oil.
Castor oil that has reached the end of its shelf life should be disposed of properly. Rather than throwing expired castor oil away, you should take it to an oil recycling center.
How to properly store Castor oil
Castor oil should be stored in a cool, dry, and dark place, away from the stove because of the heat. You can store it in a cupboard or in the refrigerator. Always keep the package well sealed to avoid air contact with the oil.
Adequate storage will delay fat oxidation and keep the chemical quality of castor oil, ensuring its beneficial properties.
Conclusion
In this short article, we answered the question, “Can castor oil go bad?” We also discussed the shelf life of castor oil and the best practices for storing it.
Citations
1. Yeboah A, Ying S, Lu J, Xie Y, Amoanimaa-dede H, Boateng KGA, et al.. Castor oil (Ricinus communis): a review on the chemical composition and physicochemical properties. Food Sci Technol [Internet]. 2021;41:399–413.
2. Vieira SA, Zhang G, Decker EA. Biological Implications of Lipid Oxidation Products. Journal of the American Oil Chemists’ Society. 2017;94(3):339-51.
3. https://castoroil-guide.com/can-castor-oil-go-bad/
5. A, Zarkovic N. Contribution of the HNE-immunohistochemistry to modern pathological concepts of major human diseases. Free Radical Biology and Medicine. 2017;111:110-26.
