Soy flour (full-fat) keeps about 6 months in the fridge at 40°F (4°C) or below, counting from the day you bought it.
| Situation | Keeps for |
|---|---|
| Unopened · pantry | 2 months |
| Unopened · fridge | 6 months |
About 6 months at 40°F (4°C) or below, according to USDA FoodKeeper v128. That window runs from the day you bought it — FoodKeeper publishes no separate after-opening figure for this one.
Soy flour (full-fat) is shelf-stable at room temperature: cool, dry pantry, or refrigerate at 40°F (4°C) or below to keep it longer. Refrigerating it mainly preserves quality rather than safety.
Look for: Sour or off smell; A slimy or sticky surface; Mould or discoloration; Cloudy or fizzing packing liquid. Never taste something to test it — when in doubt, throw it out.