Author Topic: Silly liquid yeast question...  (Read 1090 times)

Offline nicomiranda

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Silly liquid yeast question...
« on: April 20, 2011, 01:45:13 PM »
i know this is going to seem like a really silly question, but here it goes...

i know that there is an expiration date on the liquid yeast.  is there any harm in using expired liquid yeast?

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Offline denny

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Re: Silly liquid yeast question...
« Reply #1 on: April 20, 2011, 01:52:20 PM »
None whatsoever.  I've used yeast as much as 3 1/2 years past its expiration date with success.  You have to go to a bit more effort, though.  As far as I'm concerned, you should always make a starter for liquid yeast, but that's even more important for yeast past its expiration date.  There's a calculator at mrmalty.com that let's you enter the date of the yeast and tells you how big a starter to make.
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Offline punatic

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Re: Silly liquid yeast question...
« Reply #2 on: April 20, 2011, 03:33:40 PM »
Silly liquid yeast?  Does it have a yeast strain number?   ;D  (just kidding)

Isn't the date stamped on the liquid brewing yeast package the packaging date?

Bread yeast has an expiration date on the package.  The 2# package of Red Star Bakers Yeast's expiration date is usually two years after the packaging date.
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Offline EHall

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Re: Silly liquid yeast question...
« Reply #3 on: April 20, 2011, 03:51:11 PM »
know whats not silly? a yeast infection!
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Offline narvin

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Re: Silly liquid yeast question...
« Reply #4 on: April 20, 2011, 06:39:23 PM »
Silly liquid yeast?  Does it have a yeast strain number?   ;D  (just kidding)

Isn't the date stamped on the liquid brewing yeast package the packaging date?

Bread yeast has an expiration date on the package.  The 2# package of Red Star Bakers Yeast's expiration date is usually two years after the packaging date.

White Labs has an expiration date on the tube of 4 months after packaging.
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Offline denny

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Re: Silly liquid yeast question...
« Reply #5 on: April 21, 2011, 09:48:20 AM »
Wyeast doesn't put an expiration date on the yeast.  The date they use is the date it was packaged.
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Offline mxstar21

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Re: Silly liquid yeast question...
« Reply #6 on: April 28, 2011, 12:01:35 AM »
Silly liquid yeast?  Does it have a yeast strain number?   ;D  (just kidding)

Isn't the date stamped on the liquid brewing yeast package the packaging date?

Bread yeast has an expiration date on the package.  The 2# package of Red Star Bakers Yeast's expiration date is usually two years after the packaging date.

White Labs has an expiration date on the tube of 4 months after packaging.

I have heard from several home brew stores it is good up to six months, but to use a starter after the expiration date.  I prefer to do a starter anyways, even if it is before the expiration date, but that is my preference.