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Oils that kill or help you.

PostPosted: August 28th, 2015, 9:01 am
by misterjuanperalta

Hexane is used to extract edible oils from seeds and vegetables, as a special-use solvent, and as a cleaning agent. Acute (short-term) inhalation exposure of humans to high levels of hexane causes mild central nervous system (CNS) effects, including dizziness, giddiness, slight nausea, and headache. Chronic (long-term) exposure to hexane in air is associated with polyneuropathy in humans, with numbness in the extremities, muscular weakness, blurred vision, headache, and fatigue observed. Neurotoxic effects have also been exhibited in rats. No information is available on the carcinogenic effects of hexane in humans or animals. EPA has classified hexane as a Group D, not classifiable as to human carcinogenicity.

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Re: Oils that kill or help you.

PostPosted: August 28th, 2015, 10:55 am
by Yuliasir

I was a lab manager on the oilseed plant and I KNOW precisely what is the level of hexane in the finished oil.

it is ppm's.

you NEVER could be exposed to the neurologilaly damaging levels of hexane, never ever - by consuming extracted oil. If you posted that with the idea that hexane in the food oil could be a source of any neurological problems, you did the wrong thing.

Chronic long term expose means exposure over maximum allowed dose in the air of the working zone, and it is possible for people working at the refineries itself, on the petrol stations etc.

but not for those who consumes vegetable oil. Even if you are going to smell veg oil 24 hours a day.

Re: Oils that kill or help you.

PostPosted: August 28th, 2015, 11:55 am
by misterjuanperalta
Just putting the information out there for others to do with it as they please.

Re: Oils that kill or help you.

PostPosted: August 29th, 2015, 1:32 am
by Yuliasir
I am just sincerely concerend that many fellows here would not extract any proper message from your info, that is why I asked.

hope you understand that this info in the way it is presented is quite misleading - it is messing up negligible amount of residual hexane in veg oil with the effects obtained in the tests made using approx. 100 times higher than TWA tests on rats (normal practice to demonstrate acute toxic effects) or prolonged for about a rat's life length exposure (another way to demonstrate possible long term effects) - furthermore, performed by INHALATION route.

Dear fellows,

you can eat your canola, rapeseed, sunflower etc. vegoil, even if it is extracted by hexane and refined by adding acids and alkalies.
it is much healthier than raw veg oil, unless you do not have your own HACCP standardized mini pressing facility and make a spoon of fresh one every time you need it to pour on your organic salad. Raw veg oil has good taste (at least sunflower one) and contents useful phospholipides, but in few hours it became absolutely useless as phospholipides make a sediment and lose their useful quality and become a gums. They also are oxidised making no good to your guts. In a few days non-refined veg oil becomes highly acidic and also makes no good to the GIT. Oils like rapeseed or canola, if not extracted and refined, have bad taste and bad odour and sometimes even contain poisonous substances, becasue all plants are protecting their oily endosperms as much as possible. So in order to keep food efficiency and safety, we need to extract oils and refine them.

We use hexane not becasue we are stupid or greedy and do want to make you all suffering from demyelinisation or narcotizing effects of hexane. We do that becasue pressing extracts about 70 % of oils maximum (for sunflower, with the best organization of the process), and the rest goes to waste. For other oilseeds, like soybeans, extraction is the ONLY proper way to get the oil, as they are far lower in raw oil content compared to the sunflower or canola.

Hexane (low boiling point benzene fraction) is a SAFE way to recover maximum of the oil we grow. Oil has much greater boiling temperature than hexane (approx. 190 and 50 deg C), and multi-stage distillation efficiently removes hexane from your oil before it gets bottled. Further processes, in which extracted oil is several times treated by steam and vacuum, brings residual hexane in a bottled oil to a virtually ZERO.
Extraction is the way to bring food to all of us, not only for lucky few millions (not saying about a billion). It is a way to be grateful for each drop of oil which seeds created and waste virtually nothing.
it also makes oilseeds meal practically perfect protein source (which was not be so in case of pressing due to high residual oils content) and therefore a valuable cattle and poultry feed.

Hope this little bit of info would help you all to stay healthy and happy with your vegetable oil. Do not breathe the oil (gas) from your car oil tank, and you would be safe from any undesirable neurological effects of non-polar alkenes like hexane.

Yulia, being among other jobs a lab manager on the oilseeds plant.

Re: Oils that kill or help you.

PostPosted: August 29th, 2015, 5:53 am
by misterjuanperalta
The post was not intended to discuss what method of Hexane exposure will kill you. Whether it is inhaled, consumed, absorbed or otherwise, it is still a chemical that is KNOWN to be toxic and should not contact food in any manner. With the amount of oil that is consumed, a negligible amount of Hexane is too much.

The worst part about it is that oils can be extracted using other SAFE methods that do not use Hexane. I'm not a share holder for the company, so I don't care if I'm losing 40% of the oil that cannot be extracted. I'm the consumer that doesn't want 100% of the oil being extracted using Hexane. Products should be produced in the absence of known toxins. If soybeans, for example, don't produce enough oil for whatever reason, use something else, but don't contaminate them with toxins. Oil producers need to stop this practice in favor of safer methods of extraction.