Per USDA FoodKeeper
On the counterCounter
2 hours
1 hour if above 90°F
In the fridgeFridge
7–10 days
at or below 40°F (4°C)
In the freezerFreezer
Not listed
no FoodKeeper figure
On the counterCounter
Not recommended
keep it cold
In the fridgeFridge
Use-by date
follow the package date
In the freezerFreezer
Not listed
no FoodKeeper figure
Quick answer
Yes. Soy milk lasts 7–10 days in the fridge. After that, or sooner if stored badly, it spoils: watch for the signs below.
How to tell if soy milk is bad
Smell
Sour or cheesy smell when it should be clean and mild.
Texture
Lumps, curdling or a thick, slimy body.
Colour
Yellowing or a pink, green or grey tinge.
Taste
Sour or bitter at the first sip — stop and discard.
Soy milk past the expiration date
Unopened
FoodKeeper gives unopened soy milk use-by date in the fridge, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
Opened
Once opened, the printed date no longer applies. Count 7–10 days in the fridge from the day you open it.
How to keep soy milk fresh longer
- Keep refrigerated.
- Store on an inside shelf, not the door, at 40°F (4°C) or below.
- Close the container tightly; dairy absorbs fridge odours.
More about soy milk
FAQ
How long does it take for soy milk to go bad?
7–10 days in the fridge, per USDA FoodKeeper. At room temperature, 2 hours.
Can soy milk expire?
FoodKeeper gives unopened soy milk use-by date in the fridge, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
What happens if you eat bad soy milk?
Spoiled perishable food can cause food poisoning: nausea, vomiting, cramps or diarrhoea. See a doctor if symptoms are severe or last more than a few days.
How do you keep soy milk from going bad?
Keep refrigerated.
Numbers on this page come from USDA FoodKeeper and FSIS guidance. Last verified November 2026. How we verify our data · Report a wrong number