Re-hydrated textured soy protein (TSP) keeps about 3–4 days in the fridge at 40°F (4°C) or below, counting from the day you bought it.
3–4 days sealed in the fridge, against 3–4 months sealed in the pantry. Green is what this situation leaves you; husk is what it spends.
| Situation | Keeps for |
|---|---|
| Unopened · pantry | 3–4 months |
| Unopened · fridge | 3–4 days |
Air and warmth are what shorten an opened item's life — the right container buys back the days the packaging gives up once the seal's broken.
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About 3–4 days 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.
Re-hydrated textured soy protein (TSP) 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. Those are the general signs for vegetarian proteins — USDA FoodKeeper v128 publishes no spoilage note for Re-hydrated textured soy protein (TSP) specifically. Never taste something to test it — when in doubt, throw it out.