Sunflower oil
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2008-07-16T00:21:05Z
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[[Image:Zonnebloemolie (Sunflower oil).jpg|thumb|125px|Sunflower oil]]
'''Sunflower oil''' is the non-volatile oil expressed from [[sunflower]] (''Helianthus annuus'') seeds. Sunflower oil is commonly used in [[food]] as a frying oil, and in [[cosmetics|cosmetic]] formulations as an [[emollient]].
== Composition ==
Sunflower oil contains predominantly [[linoleic acid]] in [[triglyceride]] form. The [[British Pharmacopoeia]] lists the following profile:<ref>{{cite book
| author = British Pharmacopoeia Commission
| title = British Pharmacopoeia 2005
| publisher = The Stationery Office
| location = Norwich, England
| id = ISBN 0-11-322682-9
| chapter = Ph Eur monograph 1371
}}
</ref>
*[[Palmitic acid]] : 4 - 9%,
*[[Stearic acid]] : 1 - 7%,
*[[Oleic acid]] : 14 - 40%,
*[[Linoleic acid]] : 48 - 74%.
There are several types of sunflower oils produced, such as high linoleic, high oleic and mid oleic.
High linoleic sunflower oil typically has at least 69% linoleic acid. High oleic sunflower oil has at least 82% oleic acid. Variation in unsaturated fatty acids profile is strongly influenced by both genetics and climate. In the last decade high stearic sunflower lines have been developed in Spain to avoid the use of hydrogenated vegetable oils in food industry.
Sunflower oil also contains [[lecithin]], [[tocopherol]]s, [[carotenoid]]s and [[wax|waxes]]. Sunflower oil's properties are typical of a vegetable triglyceride oil. Sunflower oil is produced from oil type sunflower seeds. Sunflower oil is light in taste and appearance and has a high Vitamin E content. It is a combination of mono-unsaturated and polyunsaturated fats with low saturated fat levels.
== Physical properties ==
Sunflower oil is liquid at room temperature. The refined oil is clear and slightly amber-colored with a slightly fatty odor.
{| class="wikitable"
|-
| [[Smoke point]] (refined)
| 230 °C
| 440 °F{{Fact|date=December 2007}}
|-
| Smoke point (unrefined)
| 107 °C
| 225 °F{{Fact|date=December 2007}}
|-
| [[Density]] (25 ºC)
| 917 kg/m<sup>3</sup>{{Fact|date=December 2007}}
|-
| [[Refractive index]] (25 ºC)
| ≈1.473{{Fact|date=December 2007}}
|}
== Uses ==
As a frying oil, sunflower oil behaves as a typical vegetable [[triglyceride]]. In cosmetics, it has smoothing properties and is considered noncomedogenic. Only the high-oleic variety possesses [[shelf life]] sufficient for commercial cosmetic formulation. Sunflower oil's [[INCI|INCI name]] is ''Helianthus Annuus (Sunflower) Seed Oil''.
==Health benefits==
There are a variety of health benefits associated with the consumption of sunflower oil.
===Diet and cardiovascular benefits ===
Sunflower oil is high in the essential [[vitamin E]] and low in [[saturated fat]]. The two most common types of sunflower oil are linoleic and high oleic. Linoleic sunflower oil is a common cooking oil that has high levels of the essential [[fatty acids]] called [[polyunsaturated fat]]. It is also known for having a clean taste and low levels of [[trans fat]]. High oleic sunflower oils are classified as having monounsaturated levels of 80% and above. Newer versions of sunflower oil have been developed as a hybrid containing linoleic acid. They have monounsaturated levels lower than other oleic sunflower oils. The hybrid oil also has lower saturated fat levels than linoleic sunflower oil <ref>[http://www.sunflowernsa.com/health/default.asp?contentID=45 National Sunflower Association : Health and Nutrition<!-- Bot generated title -->]</ref>. Sunflower oil of any kind has been shown to have cardiovascular benefits as well. Diets combined with a low fat content and high levels of oleic acid have been suggested to lower cholesterol which, in turn, results in a smaller risk of heart disease <ref name="ars">[http://www.ars.usda.gov/is/pr/1998/980611.htm New Healthful Sunflower Oil Resists Breakdown / June 11, 1998 / News from the USDA Agricultural Research Service<!-- Bot generated title -->]</ref>. Sunflower oils fit this criteria. Studies of adults suggested that a balanced diet in which small quantities of saturated fats are replaced with sunflower oil has detectable cholesterol-reducing benefits. Research suggests that lower cholesterol levels can be caused by balances of polyunsaturated and monounsaturated fatty acids. Sunflower oil may help with this balance <ref name="newstarget">[http://www.newstarget.com/009426.html Trans-free NuSun(TM) Sunflower Oil Lowers Cholesterol More than Olive Oil (Press Release)<!-- Bot generated title -->]</ref>.
===Restaurant and food industry uses ===
Restaurants and food manufacturers are becoming aware of the health benefits of sunflower oil<!--as compared to what alternatives? -->. The oil can be used in conditions with extremely high cooking temperatures <ref name="newstarget"/>. It may also help food stay fresher and healthier for longer periods of time <ref name="ars"/>. Food manufacturers are starting to use sunflower oil in an effort to lower the levels of trans fat in mass produced foods <ref name="newstarget"/>. A number of common snack foods currently contain sunflower oil, including [[Kettle Chips]], [[Sun Chips]], [[Sunflower Chips]], [[Ruffles]], [[Walkers]] and [[Lay's]] potato chips; the recipe of the latter was modified in late 2006 in order to include the oil.<ref>[http://www.foodprocessing.com/industrynews/2006/060.html Oil changes allows Frito-Lay to slash saturated fat<!-- Bot generated title -->]</ref>
===Sunflower oil as skin protection===
Sunflower oil may also have suggested skin-health benefits. Sunflower oil, like other oils, can retain moisture in the skin. However, it may also provide a protective barrier that resists infection. Studies using sunflower oil have been conducted involving pre-term infants that are often susceptible to infection due to their underdeveloped skin. Research suggests that pre-term infants with low birth weight can benefit from sunflower oil skin treatments. Infections decreased by 41% in infants that received a daily skin treatment of sunflower oil. The sunflower oil provided a protective barrier against infection that was not otherwise present on the infant <ref>[http://www.medscape.com/viewarticle/501077 Log In Problems<!-- Bot generated title -->]</ref>.
==References==
<references />
==External links==
*http://www.sunflowernsa.com/all-about/default.asp?contentID=41
http://journeytoforever.org/biofuel_library/oilpress.html
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[[Category:Cosmetic chemicals]]
[[Category:Cooking oils]]
[[Category:Vegetable oils]]
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