WYEASY smack pack left out still good?

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Accidentally left a smack pack out at room temp for a few days is it still good to use?

What temperatures was it exposed to? Since you really have nothing to lose, smack that sucker and see if it puffs up... Make a starter for the batch and then you should be ok (provided it puffs up first)... The puffing will just be to 'proof' the yeast (show that some are still alive enough to answer the call)...
 
Agreed, if it swells its alive. The total viability may be affected, but that can be overcome by a well made starter.
 
Yeast love room temps. Now, the downside is that at room temp, all of their biological processes that send them careening towards eventual death occur faster than fridge temps, which is why cold storage is recommended. But you didn't do them any significant damage, so no worries.
 
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