Older adults
Older adults may be more vulnerable to dehydration and complications from foodborne illness.
Young children
Children can become dehydrated more quickly than adults when they develop vomiting or diarrhea.
People with weakened immune systems
People receiving chemotherapy, taking immunosuppressive medication, or living with certain medical conditions may need to avoid particular high-risk raw foods.
They should follow individualized advice from their healthcare team.
10. When Is Cooking a Better Choice?
Cooking is one of the most effective ways to reduce many biological hazards in vegetables.
Adequate heat can kill many disease-causing bacteria, parasites, and viruses.
Cooking is particularly useful when:
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The vegetables are visibly dirty.
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The source of the produce is uncertain.
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The vegetables will be served to people at higher risk of foodborne illness.
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Local food-safety guidance recommends cooking.
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The produce is intended for a dish that is normally cooked.
However, cooking is not a substitute for basic cleaning.
Wash vegetables before preparation to remove soil and debris. Use clean utensils and avoid cross-contamination.
Also remember that some toxins produced by microorganisms may not be destroyed by ordinary cooking. Preventing contamination and storing food correctly remain important.
11. What About Pesticide Residues?
Pesticides are a separate concern from worms and parasites.
Farmers may use approved pesticides to protect crops from insects, weeds, and plant diseases.
When used correctly, these products are subject to rules governing application, permitted crops, and residue limits.
Problems can occur when pesticides are misused, applied too close to harvest, or used in ways that violate regulations.
Washing under running water can reduce some surface residues, as well as dirt and microorganisms.
Peeling or removing outer leaves may reduce certain residues further, but it may also remove some nutrients.
Washing cannot reliably remove pesticides that have entered the plant tissue.
Consumers can reduce unnecessary exposure by:
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Buying produce from reliable suppliers.
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Choosing vegetables that appear fresh and properly handled.
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Washing produce before eating or cooking.
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Removing damaged outer leaves.
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Following local food-safety recommendations.
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Eating a variety of vegetables rather than relying on one type.
It is not necessary to avoid vegetables because of generalized fears about pesticide residues.
12. How to Store Vegetables After Washing
Proper storage is just as important as washing.
Vegetables can become contaminated again if they are placed in dirty containers or handled with unclean utensils.
A few simple habits help:
Use clean containers. Store vegetables in clean food-safe containers or bags.
Keep raw produce separate from raw meat. Store meat and seafood in sealed containers, preferably on lower refrigerator shelves to prevent drips.
Refrigerate perishable produce. Follow storage guidance for the specific vegetable.
Avoid excess moisture. Wet leaves may deteriorate more quickly. Drain them thoroughly before refrigeration.
Do not leave cut vegetables at room temperature for long periods. Refrigerate perishable prepared foods promptly.
Wash hands before serving. Clean hands and utensils help prevent recontamination.
If vegetables develop mold, slime, an unusual smell, or signs of decay, discard them when appropriate rather than trying to rescue them by washing.
13. What Should You Do If You Find a Worm or Insect in Vegetables?
Finding a small insect in a vegetable can be unpleasant, but it does not automatically mean the food is dangerous.
First, identify what you are seeing.
A small green caterpillar, for example, may be a plant-feeding insect rather than an intestinal parasite.
If the vegetable is otherwise fresh and the insect is limited to one area, you can remove the affected part and wash the remaining produce carefully.
However, discard vegetables that are extensively damaged, rotten, slimy, or contaminated with animal feces.
Do not eat produce that has been exposed to sewage or unsafe water simply because it looks clean after rinsing.
If you are uncertain about the contamination, it is safer to discard it.
14. What Symptoms Can Foodborne Infection Cause?
Foodborne infections can cause a range of symptoms depending on the organism involved.
Common symptoms include:
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Diarrhea.
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Abdominal pain or cramps.
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Nausea.
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Vomiting.
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Fever.
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Loss of appetite.
Some infections cause symptoms within hours, while others may take several days or longer to appear.
Most mild episodes improve with supportive care, but some infections can become serious.
Seek medical attention if you experience bloody diarrhea, persistent high fever, severe abdominal pain, signs of dehydration, or symptoms that do not improve.