Talk:Rice bran oil/Archive 1

Inexplicably high smoke point

Given the relatively poor stability of polyunsaturated fats, and high stability of saturated fats, how can rice bran oil's very high smoke point be explained? Labeled on NOW Foods 100% Virgin Organic Rice Bran Oil, per 1 Tbs serving: polyunsaturated 5g, monounsaturated 6g, saturated 2.5g. —Preceding unsigned comment added by Zymatik (talk • contribs) 05:11, 23 March 2010 (UTC)

Fixed - Bailey's reports 213°C Jon (talk) 13:16, 1 March 2012 (UTC)

Can someone please reinstate the proper smoke point according to AOCS Cc 95a-48 testing minimum smoke point for fully refined rice bran oil is 450 f / 232 c http://www.ricebranoil.biz/spec/rbdd.html24.52.202.56 (talk) 20:46, 27 April 2013 (UTC)

Production/extraction

Does anyone know how the oil is extracted from the germs? because I don´t think that rice germs or husk contain any oil, or oil-like ,,substance" whatsoever. 82.99.141.110 21:03, 20 August 2006 (UTC)

This is what I have found on some site: "expeller-pressed in the absence of light, heat and oxygen"

The oil is extracted from the Rice bran. The bran contains 18% oil. Commercial extraction involves what is called solvent or hexane extraction. —Preceding unsigned comment added by 75.24.213.111 (talk) 17:56, 29 September 2007 (UTC)

So is it refined oil or non refined oil Aaalshabi (talk) 09:03, 13 April 2019 (UTC)

So is it refined oil or non refined oil ? Aaalshabi (talk) 09:04, 13 April 2019 (UTC)

health

any studies on health? -- Markthemac 10:28, 1 May 2009 http://care.diabetesjournals.org/content/31/8/1574.long During the late 1970s, the consumption of rice-bran oil laced with PCBs poisoned thousands of Taiwanese. Between 1993 and 2003, we examined 1,054 Yucheng (“oil disease”) victims against neighborhood reference subjects using a protocol blinded for POP exposure. Here, we report the results derived from 378 Yucheng subjects and 370 matched references. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=18831733 The Yusho poisoning incident, which was caused by rice bran oil contaminated with polychlorinated biphenyls (PCBs), polychlorinated quarterphenyls (PCQs) and polychlorinated dibenzofurans (PCDFs) generated by heat denaturation of PCB, occurred in 1968 in western Japan. Annual physical, dermatological, dental, ophthalmological and laboratory examinations were conducted for Yusho patients after the incident. From 2001, blood levels of individual PCDF congeners were also measured. The blood levels of 2,3,4,7,8-pentachlorodibenzofuran (2,3,4,7,8-PeCDF), PCBs and PCQs in Yusho patients were found to be significantly higher than those of the general population. http://jn.nutrition.org/cgi/content/full/136/6/1472 Several studies in humans (1,2) and animals (3,4) have established that the ingestion of a rice bran oil (RBO)3 diet reduces serum cholesterol and triglycerides. From the results of human and animal studies, researchers speculated that the hypocholesterolemic effect of RBO is attributed to its specific components, -oryzanol and -tocotrienol. The major components of -oryzanol were identified as ferulic acid esters of triterpene and phytosterols (5). -Oryzanol was shown to decrease plasma cholesterol in rats (3,4). An amount of -oryzanol > 0.2% (weight percent of the diet) decreased serum and liver cholesterol levels in hypercholesterolemic rats induced by additional dietary cholesterol. The mechanism of the hypocholesterolemic effect of RBO and -oryzanol is through decreasing cholesterol absorption in the intestines and increasing fecal cholesterol excretion (6). RBO is also rich in tocotrienols; the major components are ß- and -tocotrienols. It is postulated that tocotrienols, especially -tocotrienol, the most hypocholesterolemically potent of all of the tocotrienols, regulates cholesterol production in mammalian cells by inhibiting 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase activity, and decreasing liver cholesterol levels and plasma total cholesterol (TC) and LDL cholesterol (LDL-C) concentrations (7). Much research has focused on the ability of RBO to decrease plasma levels of TC and LDL-C in both hypercholesterolemic and normal animals. However, it is important to determine whether changes in plasma lipids and insulin resistance in diabetes after administration of an RBO diet are related to modifications in gene expressions of cholesterol 7 -hydroxylase (CYP7A1), the LDL-receptor, and HMG-CoA reductase, major regulators for maintaining whole-body cholesterol homeostasis.

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Reliability of References

I've been working on getting reliable sources for the Grape seed oil article, and it looks like this article needs it too. Basically Google Scholar and Pubmed are your friends, and relying on industry marketing material for fatty acid and vitamin compositions is generally not a good idea. Jon (talk) 13:10, 9 June 2009 (UTC)

Moreover, the formatting of the "health" section seems more an advertisement than a real research. Given the importance of the topic, I think it should there should be at least some warning. Rliffredo (talk) 15:54, 20 September 2015 (UTC)

Please do not auto-direct the topic of Wheat bran oil to

the one of Bran --222.64.22.236 (talk) 23:49, 18 May 2010 (UTC)

See the search results

• http://scholar.google.com.hk/scholar?hl=en&q=allintitle%3A+wheat+bran+oil&btnG=Search&as_sdt=2000&as_ylo=&as_vis=0

--222.64.22.236 (talk) 00:04, 19 May 2010 (UTC)

• http://scholar.google.com.hk/scholar?hl=zh-CN&q=%E5%9C%A8%E6%A0%87%E9%A2%98%3A+%E5%B0%8F%E9%BA%A6%E8%83%9A%E8%8A%BD%E6%B2%B9%E8%90%A5%E5%85%BB&btnG=%E6%90%9C%E7%B4%A2&lr=&as_ylo=&as_vis=0

--222.64.22.236 (talk) 00:22, 19 May 2010 (UTC)

Info about other bran oil are based on the following....

• http://scholar.google.com.hk/scholar?as_q=barley+bran+oil&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&as_sdt=1.&as_sdtp=on&as_sdts=5&hl=en

• http://scholar.google.com.hk/scholar?hl=en&q=allintitle%3A+oat+bran+oil&btnG=Search&as_sdt=2000&as_ylo=&as_vis=0

--222.64.22.236 (talk) 00:15, 19 May 2010 (UTC)

Info about rice germ oil.....

• http://scholar.google.com.au/scholar?as_q=rice+germ+oil&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&as_sdt=1.&as_sdtp=on&as_sdts=5&hl=en

--222.64.22.236 (talk) 00:39, 19 May 2010 (UTC)

• http://scholar.google.com.hk/scholar?as_q=%E7%B1%B3%E8%83%9A%E8%8A%BD%E6%B2%B9&num=10&btnG=%E6%90%9C%E7%B4%A2%E5%AD%A6%E6%9C%AF&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&hl=zh-CN

--222.64.22.236 (talk) 00:41, 19 May 2010 (UTC)

My Paparazzi User:Waitak, I don't like you following me

OK....??? Look at what you have done to me in another page

• http://en.wikipedia.org/w/index.php?title=Wheat_germ_oil&diff=362928677&oldid=362923588

BTW, the above page did not genuinely reflect to the editing action --58.38.44.10 (talk) 10:48, 19 May 2010 (UTC)

alpha or gamma Linolenic Acid?

There should be a better source for the fatty acid content. It does not specify whether the oil contains alpha or gamma linolenic acid. —Preceding unsigned comment added by 128.220.23.239 (talk) 18:35, 24 August 2010 (UTC)

oh and another thing, the numbers don't add up. linoleic is polyunsaturated and listed as 39.1% but above it says 33% of the fatty acids are unsaturated. Pelirojopajaro (talk) 18:49, 24 August 2010 (UTC)

AKA Oryzanol (?)

The article says:

"Rice bran oil (aka Gamma Oryzanol) was .........."

... suggesting they are the same thing.

But according to the bottle of rice bran oil I have, 15 ml of the oil contains 70 mg of oryzanol, suggesting they are not the same thing.

Please can someone resolve this? Wanderer57 (talk) 18:44, 1 January 2012 (UTC)

Fixed - there's some good guff in the Bailey's chapter on rice bran oil. Jon (talk) 13:22, 1 March 2012 (UTC)

oil composition breakdown - good

It's a good thing to see a thorough oil composition.

It would be good if all edible food articles had one somewhere.

Please consider adding trans fat content when they are found, even <0.5g /100g, as studies have found them to be the most harmful to man and should be avoided where possible. — Preceding unsigned comment added by 123.200.171.37 (talk) 05:06, 2 August 2013 (UTC)

A Commons file used on this page has been nominated for deletion

The following Wikimedia Commons file used on this page has been nominated for deletion:

• Rice bran oil.jpg

Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 23:06, 30 March 2019 (UTC)