Consuming water spinach that has been sprayed with pesticides can lead to stomach aches, nausea, and even acute poisoning, exhibiting symptoms such as tremors and difficulty breathing. This is especially dangerous for children and the elderly. Over time, the accumulation of these chemicals in the body increases the risk of cancer, liver, and kidney failure.
Vietnam’s Ministry of Health has warned that exceeding permissible limits of pesticide residues is the leading cause of food poisoning in the country. Therefore, if you notice any abnormal signs in water spinach, refrain from consuming it to protect your family’s health.
1. Unnaturally shiny and dark green leaves
Naturally grown water spinach usually has a light green color and is not overly shiny. Be cautious if you encounter water spinach with dark green, shiny leaves. According to Healthline, this could indicate the presence of pesticides or growth stimulants such as nitrates, which can harm the liver and kidneys if accumulated in the body over time.
2. Abnormally swollen and watery stems
While thick, watery stems may appear appealing, they could be a result of excessive chemical fertilizers or stimulants. Naturally grown water spinach usually has smaller, firmer stems. If the stems release a lot of water when cut, it’s likely that the vegetable has been treated with chemicals, which can cause digestive issues if consumed.
3. Pristine appearance, free from insect damage
Naturally grown water spinach often has a few insect holes or traces of insect activity. If the bunch of water spinach you purchase is immaculate and free of any bite marks, it’s likely due to heavy pesticide use. Chemicals such as organophosphates can cause poisoning and affect the nervous system if consumed over a long period.
4. Pungent or odorless
Fresh water spinach usually has a mild, natural aroma. If the vegetable has a pungent smell resembling chemicals, or no smell at all, it’s likely due to pesticide residues. Certain chemicals, such as chlorpyrifos, can even eliminate the natural odor of the vegetable.
Precautions when preparing water spinach to ensure health and safety:
Avoid consuming water spinach out of season
Water spinach is typically in season during the summer. Out of season, it is more likely to be treated with excessive pesticides and growth stimulants. If you must consume it out of season, opt for organically grown water spinach, even if the price is three to five times higher.
Do not consume water spinach with milk
Water spinach contains components that reduce the absorption of calcium from milk. Therefore, it is not advisable to consume these two foods together to avoid wasting valuable nutrients.
Thoroughly boil the water spinach
Water spinach may contain mud, parasites, or pesticide residues. When boiling, wait for the water to reach a rolling boil before adding the vegetable, and make sure to cook it thoroughly to ensure safety.
Wash the water spinach with diluted salt water
Soaking the water spinach in diluted salt water for 15-20 minutes helps remove bacteria and chemicals from the surface of the vegetable.
Wash the water spinach with rice water
Rice water has a mild acidic pH and a sticky consistency, which helps absorb any remaining pesticides. This is a safe and effective way to wash vegetables and is particularly useful for small fruits like strawberries and grapes.
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