Expiration Date of Flax Seed Oil - VeggieBoards
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#1 Old 02-03-2008, 08:44 AM
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How long after the expiration date on flax seed oil, should you continue to use it? Also, is it really necessary to eat flax seeds?



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#2 Old 02-03-2008, 12:04 PM
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flax seeds are great in that you KNOW when they've gone rancid. They go RANCID. They loose their wonderful nutty taste and adapt a more death in a flavor taste.



Omega 3 is extremely important to your diet and has been known to help with things such as maintaining healthy weight, healthy brain function, energy levels, mental health (ie ward off depression), skin vitality and the list goes ON. Google it to find out more. I would definately definately recommend consuming flax seed on a regular basis--either as an oil or as a ground seed (whole seeds taste nice, but are a bit useless in that your digestive system can't open up the hull so you don't actually digest almost any of the omega-3s). Plus.. its tasty. On a side note, don't cook with flax seed oil: it shouldn't be heated past lukewarm.
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#3 Old 02-03-2008, 12:13 PM
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Is it just a date or does it say "best for" or anything like that on it?



Quote:
The major codes are:
  • Sell by - Don't buy the product after this date. This is the "expiration date."
  • Best if used by - Flavor or quality is best by this date but the product is still edible thereafter.
  • Use by - This is the last day that the manufacturer vouches for the product's quality.
http://www.algeri-wong.com/wiki/index.php?title=Expiration_Dates





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#4 Old 02-03-2008, 12:17 PM
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I use pretty much everything way past it's expiry date.

Do a small taste test to see if it's rancid, if it's not then it should be fine to use. Even if it is rancid it should be fine to use it will just taste crap!

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#5 Old 02-03-2008, 12:20 PM
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The date was Dec. 27. It just says freshest by. I think it still smells normal-I have a cold and no one else use it.

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#6 Old 02-03-2008, 02:38 PM
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Quote:
Originally Posted by Wednesday_12 View Post

I use pretty much everything way past it's expiry date.

Do a small taste test to see if it's rancid, if it's not then it should be fine to use. Even if it is rancid it should be fine to use it will just taste crap!



I wouldn't eat it if it were rancid. Even if it doesn't make you sick, it's just pointless anyway--flax seed is prone to going rancid because it is highly unsaturated and oxidizes easily... however, the whole omega-3 thing literally means there is a double bond on the third carbon in from the methyl end of the fatty acid tail (or, more simply, that there is a double bond in a special place) if that double bond oxidizes, the oil is no longer omega 3.. in fact it's no longer an oil!



so yeah, considering how rancid flax seed both tastes bad and is likely neutral or bad for you... why bother. I keep my ground flax seed in the freezer.. a lot of people advise to just keep whole flax seeds and grind it yourself right before consumption but dude.. so much effort.
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#7 Old 02-03-2008, 02:52 PM
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#8 Old 02-03-2008, 03:11 PM
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good explanation, thanks.
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#9 Old 02-03-2008, 11:40 PM
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(I just meant it wouldn't actually kill you or do you harm if it was rancid! But thanks for the extra info!).

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#10 Old 02-04-2008, 02:13 PM
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hmm. Does the same go for Sesame Oil?
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#11 Old 02-04-2008, 03:11 PM
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For those who read my previous post: Note that I have edited it slightly! I was wrong about what happened to oil when it was oxidized (I was mixing up an oxidation reaction with its opposite, a reduction reaction)--when oil is oxidized it is so fundamentally changed it is no longer an oil! All that stuff I said about omega 6 and 9 was wrong. heh. So sorry! The basic message is the same though, just the chemistry was a bit off.





As to Dee1111 about seasame oil.. yeah, ok basically if something is rancid chances are you don't want to consume it. The fact is something is going on inside of it chemically and even if it doesnt end up harming you, it does not have the same health benefits the origional product did and now it tastes like crap.
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#12 Old 02-04-2008, 05:05 PM
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