Today was a brew day for me, and while I was waiting for the water to boil, I re-hydrated my yeast. Unfortunately my wort didn't cool as fast as I Hoped and my yeast starter lost all of it's foam in the meantime. Is it dead? Can I still use the yeast some how?

  • How much time was there between making your yeast starter and the moment you could pitch? Did you even make a starter, or did you just re-hydrate dry yeast?
    – chthon
    Commented May 12, 2017 at 11:14
  • About 4 and a half hours. There's a difference between making a yeast starter and re-hydrate dry yeast? I think I just re-hydrated Commented May 12, 2017 at 11:35
  • 1
    A starter is putting yeast in a small volume or wort so it starts its metabolism and potentially starts growing. Putting dry yeast in water is just rehydrating it but no appreciable metabolism starts. If you just put it in water it does tend to foam some but that foam means nothing. Certainly nothing when it falls/fades.
    – brewchez
    Commented May 15, 2017 at 12:16
  • Side note, how do you know it is a he?
    – Sander
    Commented May 16, 2017 at 11:52
  • Noted, will not assume gender in the future (it's 2017 after all) Commented May 16, 2017 at 19:58

1 Answer 1


No, you don't have a problem. Yeast does not die that fast. You can still use the rehydrated yeast, it will get active back again when you pitch it in your wort. If you did not cover it, then just hope that nothing else gets in your wort also.

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