What Constitutes Fresh?

[Rogermort]

When buying liquid yeast, what sort of life should i be expecting on a phial? White labs as an example, should I be expecting two months to the use by date, three months? Four?

[McMullan]

They are 'fresh' when they come off the production line. What then happens during transport and storage is unpredictable. As long as you make a starter, any in-date pack should be fine. Out of date up to at least 6 months, I'd build up a starter from something like 500ml @ 1.020 first. The older the pack, the lower the cell viability. Personally, I'd ignore any marketing claims.

[borischarlton]

When they are produced the vials have 4 months and the PurePitch have 6 months. That should let you know how long your supplier has had it in the (hopefully) fridge.
Cheers

Rob

[Rogermort]

When they are produced the vials have 4 months and the PurePitch have 6 months. That should let you know how long your supplier has had it in the (hopefully) fridge.
Cheers

Rob

Great answer! I'll try to order just before I need them then.

[McMullan]

Do WL guarantee that 6 months claim, in terms of pitching without making a starter? Trading Standards might get busy

[rpt]

Rob states the best before date on his website so you know how fresh the vial is when you order.

[f00b4r]

Rob states the best before date on his website so you know how fresh the vial is when you order.

I love this and is the reason I usually order liquid yeasts from him.