Off flavors from Old Vials?

[rkbarnes82]

So I made a starter of wlp090(using yeastcalc) and it should be already to go for tonight. Question is; I have 3 additional vials of wlp090 that are over a year old, I'm guessing they are probably about 10% tops at this point. Should I just toss them in when I pitch or am I risking some kind of off flavor from dead yeast or something? Not concerned with overpitching.

 

[prandlesc]

I wouldn't risk it - seems like very little value. You might try making a starter out of them and using it in your next brew. You might need to make a stepped starter to get them back to viable pitching rates, but if it works, you're a few $ ahead.