5 vegetables you should never eat raw — they may hide worm nests that turn into parasites in your stomach | August 23, 2025

When people think of parasites, they often picture frightening organisms that steal nutrients and cause serious disease. In truth, parasites have been a threat to human health for thousands of years. Even today, nearly 2 billion people worldwide are infected annually, with hundreds of thousands of deaths reported.

Thanks to improved sanitation, many countries — including Vietnam — have controlled the spread of several parasitic diseases. Still, the risk of infection in everyday life remains. Surprisingly, some of the vegetables we commonly eat are considered “parasite hotspots”, especially when eaten raw or undercooked.

5 Vegetables That Commonly Harbor Parasites
1. Water Chestnut

Because it grows in swamps and paddy fields, water chestnut is highly susceptible to worms and harmful bacteria. Eating it raw can cause digestive illness, especially in people with weaker stomachs.

2. Water Celery

This plant thrives in damp, muddy environments, which makes it a potential carrier of liver flukes. Consuming it raw increases the risk of diseases that can spread from livestock to humans.

3. Arrowhead

Nutritious as it may be, arrowhead provides an ideal surface for parasites to attach. When eaten undercooked, these organisms can easily enter the body and trigger infections.

4. Water Caltrop

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