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What Does Walnut Oil Consist Of?

What Does Walnut Oil Consist Of?
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Walnuts are a crucial component of the diet, primarily due to their high vitamin content, energy density, and being a source of essential unsaturated fatty acids (NFCs). Consumption of them is recommended for the prevention of diseases such as cancer, cardiovascular diseases, diabetes, Alzheimer's disease, or osteoporosis. Equally valuable is oil derived from walnuts.
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Properties and composition of nut fat

Nut fat is derived from carefully selected nuts through the process of extracting their pulp. It has a light yellow or greenish hue. It is distinguished by a mild nutty flavor and a sweet taste with a hint of caramel and a subtle nutty aroma. Furthermore, nut fat is one of the richest sources of unsaturated fatty acids, including omega-3 (linolenic acid), omega-6 (linoleic acid), and omega-9 (oleic acid). Researchers also highlight the fact that nut fat has the most advantageous ratio of n-6 to n-3 fatty acids. Additionally, nut fat contains substantial amounts of vitamins A, E, K, and B vitamins.
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Health benefits of walnut oil

Walnut oil is becoming increasingly popular in supermarkets in Poland. It is appreciated not only for its unique taste, but also for its potential health benefits. According to the latest research published in The Journal of Nutritional Biochemistry, consuming walnuts can affect the composition of the microbiome, which in turn can reduce the risk of many civilization diseases. In a study by Zibaeenezhada M. J. and colleagues among diabetics, it was shown that daily consumption of 15 ml of walnut oil has a positive effect on the lipid profile. Thanks to supplementation conducted for 90 days, the total cholesterol, LDL cholesterol, and triglyceride levels in the blood significantly decreased. In another study published in The International Journal of Endocrinology and Metabolism, a decrease in blood glucose levels was observed in diabetic patients who consumed 15 ml of oil over three months. Walnut oil also has laxative properties, which are important in case of digestive problems and facilitates the work of the intestines and supports the functioning of the digestive system. Furthermore, as a rich source of omega-3 fatty acids, it has anti-inflammatory properties and also exhibits antibacterial, antifungal, and antiseptic properties. There are also studies suggesting the potential anticancer properties of walnut oil due to the presence of polyphenols, which can reduce the risk of cancer cell growth. It is also emphasized that walnut oil has a positive effect in the treatment of multiple sclerosis by reducing the severity of the disease, inhibiting platelet aggregation, and reducing the release of proinflammatory cytokines. It has also been found that regular consumption of walnut oil can help reduce appetite, which is important information for people struggling with excess weight.
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Utilization of nut oil in the kitchen

Due to its subtle flavor, Italian nut oil is particularly recommended as a component in salads, raw food, dressings or sauces. It also works exceptionally well as an addition to: pancakes, cakes, pastries and desserts served cold. It is important to note that it should not be used for frying due to its sensitivity to oxidation. This oil should be used exclusively in cold conditions, as it loses its valuable health properties after heating and its taste becomes bitter.
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Preservation of oil

This kind of oil is obtained via cold pressing, hence it is necessary to pay particular attention to its proper storage and quick utilization. During the purchase of oils acquired through cold pressing, we should ensure they are stored in a sealed bottle of dark glass. The best location for storing the oil is a cool and dark place. If the oil is stored appropriately, it should maintain its freshness for a period of three months, bear in mind that the expiration date of nut oil is very short.
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Borecka W., Walczak Z., Starzycki M., Orzech włoski (Juglans Regia L.) – naturalne źródło prozdrowotnych składników żywności, „Nauka. Przyroda. Technologie” 2013, 7, 2, 1–7.
Byerley L.O. et al., Changes in gut microbial communities following addition of walnuts to the diet, „The Journal of Nutritional Biochemistry” 2017, 48, 94–102.
Jarosz A., Olej z orzecha włoskiego – skład i zastosowanie, poznajsienatluszczach.pl/2017/02/23/olej-z-orzecha-wloskiego/ (20.05.2019).
Kargulewicz A., Olej z orzecha włoskiego – sekret długowieczności i zdrowia, „Food Forum” 2017, 5, 21, 57.
Kłopotek K., Ocieczek A., Palka A., Wpływ temperatury przechowywania na wybrane parametry jakości olejów z orzechów, „Zeszyty Naukowe Akademii Morskiej w Gdyni” 2017, 99, 34–47.
Łoźna K. et al., Skład kwasów tłuszczowych olejów zalecanych w profilaktyce chorób cywilizacyjnych, „Problemy Higieny i Epidemiologii” 2012, 93, 4, 871–875.
Zibaeenezhad M.J. et al., Effects of walnut oil on lipid profiles in hyperlipidemic type 2 diabetic patients: a randomized, double-blind, placebo-controlled trial, „Nutrition & Diabetes” 2017, 7(4), 259.
Zibaeenezhad M.J. et al., The effect of walnut oil consumption on blood sugar in patients with diabetes mellitus type 2, „International Journal of Endocrinology and Metabolism” 2016, 14(3), 1–8.
Scientifically reviewed by a clinical dietitian • 24.03.2026

Borecka W., Walczak Z., Starzycki M., Orzech włoski (Juglans Regia L.) – naturalne źródło prozdrowotnych składników żywności, „Nauka. Przyroda. Technologie” 2013, 7, 2, 1–7. Byerley L.O. et al., Changes in gut microbial communities following addition of walnuts to the diet, „The Journal of Nutritional Biochemistry” 2017, 48, 94–102. Jarosz A., Olej z orzecha włoskiego – skład i zastosowanie, poznajsienatluszczach.pl/2017/02/23/olej-z-orzecha-wloskiego/ (20.05.2019). Kargulewicz A., Olej z orzecha włoskiego – sekret długowieczności i zdrowia, „Food Forum” 2017, 5, 21, 57. Kłopotek K., Ocieczek A., Palka A., Wpływ temperatury przechowywania na wybrane parametry jakości olejów z orzechów, „Zeszyty Naukowe Akademii Morskiej w Gdyni” 2017, 99, 34–47. Łoźna K. et al., Skład kwasów tłuszczowych olejów zalecanych w profilaktyce chorób cywilizacyjnych, „Problemy Higieny i Epidemiologii” 2012, 93, 4, 871–875. Zibaeenezhad M.J. et al., Effects of walnut oil on lipid profiles in hyperlipidemic type 2 diabetic patients: a randomized, double-blind, placebo-controlled trial, „Nutrition & Diabetes” 2017, 7(4), 259. Zibaeenezhad M.J. et al., The effect of walnut oil consumption on blood sugar in patients with diabetes mellitus type 2, „International Journal of Endocrinology and Metabolism” 2016, 14(3), 1–8.

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