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Doctors say symptoms of food-related poisoning may include nausea, vomiting, stomach pain, dizziness, difficulty breathing, or weakness. Children and elderly people are usually more vulnerable because their immune systems are more sensitive.
Certain vegetables, especially bitter or spoiled varieties, may contain higher levels of naturally occurring toxins. Experts warn people not to eat vegetables with unusual tastes, strange odors, or signs of decay. Improper storage in hot environments may also increase bacterial growth.