Foods that contain botulinum toxin do not have a distinctive or off‑putting taste, odor, or appearance; the toxin is odorless, tasteless, and colorless, so contaminated food often looks and tastes completely normal. Therefore you cannot rely on flavor to detect botulism risk. If you suspect that a food might be improperly processed, canned, or otherwise at risk for botulism, discard it and avoid consumption, and seek medical advice promptly if anyone has eaten it and develops symptoms such as visual changes, difficulty swallowing, dry mouth, or weakness.
Do foods that contain botulinum toxin have an unusual taste?
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Last updated: May 16, 2026 • View editorial policy
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