Fresh vegetables are widely considered one of the healthiest foods people can eat, but experts warn that some raw vegetables may also carry hidden parasites if they are not cleaned properly before consumption.

A recent study examining hundreds of fresh vegetable samples found that several commonly eaten vegetables showed signs of parasite contamination, raising concerns among people who regularly consume raw salads, herbs, and uncooked greens.

Among the vegetables tested, celery ranked among the highest for parasite contamination. Researchers explained that vegetables with:

• layered leaves,
• uneven surfaces,
• or close contact with soil

can more easily trap:

• parasite eggs,
• bacteria,
• and microscopic contaminants.

Health specialists say parasites may enter vegetables through:

• contaminated water,
• untreated fertilizer,
• poor handling during harvesting,
• or unsanitary storage conditions.

According to experts, some parasites linked to poorly washed produce may affect the digestive system and, in rare severe cases, potentially spread to other organs if left untreated.

Despite the alarming findings, nutritionists emphasize that vegetables like celery still provide important health benefits because they are rich in:

• fiber,
• vitamin C,
• potassium,
• antioxidants,
• and hydration-supporting nutrients.

Celery is especially popular among people trying to:

• lose weight,
• improve digestion,
• support heart health,
• or follow low-calorie diets.

However, specialists warn that:

“healthy food can still become risky if hygiene is ignored.”

To reduce the risk of parasites and bacteria, food safety experts recommend:

• soaking vegetables before eating,
• washing leaves carefully under running water,
• using vinegar or baking soda solutions when appropriate,
• and cooking vegetables thoroughly whenever possible.

Experts also say vegetables eaten raw deserve extra attention because parasite eggs can sometimes survive on surfaces that appear perfectly clean to the naked eye.

Many people online admitted they were shocked after learning that foods commonly associated with “healthy eating” could still carry hidden contamination risks.

Still, doctors stress that the solution is not avoiding vegetables entirely, but rather:

cleaning and preparing them properly before eating.