How to choose clean, delicious pre-shelled snails free from chemicals for family meals
1. Water glass: The hidden "enemy"
Recently, Ho Chi Minh City Police dismantled a ring processing snail meat with industrial chemicals in Rach Cat Ben Luc. At the scene, authorities discovered large quantities of snail meat soaking in "liquid glass" chemicals. Even more alarming, the facility owner admitted to supplying thousands of tons of contaminated snails to the market over many years.
In industry, sodium silicate (water glass) is an ingredient used in producing cement, detergents, or manufacturing glass. In agriculture, water glass is used to coat seedlings to curb mold and enhance plant resistance, contributing to reduced use of chemical pesticides. However, this application requires extremely strict technical procedures and dosages to ensure safety.
Alarmingly, this chemical is being abused by unscrupulous traders in food processing to bleach tarnished snails gleaming white and strip away slime "at lightning speed," allowing the chemical to seep deep into the snail meat and posing direct harm to consumers.
Specialist Doctor I Tran Thi Hieu, Head of the Nutrition Department at Thu Duc Regional General Hospital, stated that when misused on snail meat, it causes unpredictable consequences.
The "false weight gain" phenomenon: According to Dr. Hieu, this chemical forms a coating film that makes snail meat retain water and swell up. This not only allows dishonest traders to profit from the added weight, but also creates an artificially chewy, crunchy texture, deceiving consumers' taste buds.
Health risks: If ingested, liquid glass (water glass) can cause burns to the digestive tract mucosa, leading to chronic poisoning and severely affecting internal organs.
2. Rules to remember when buying snails at the market
When standing in front of a market stall, don't just rely on eye-catching appearances. Use 3 senses to check:
Look at the color: Wild snails are typically off-white, yellowish, or dark gray depending on the variety. If you see an entire tray of snails that is "spotlessly clean and shiny," it is highly likely they have been chemically treated.
Touch to test elasticity: Fresh snail meat should be firm and springy to a gentle touch. In contrast, chemically treated snails are often bloated yet feel crumbly, soft, and unusually watery when handled.
Smell: Untreated snails have the characteristic smell of seafood and natural mud and soil. Chemically soaked snails often lose their natural smell, which is replaced by a slightly acrid odor or an overpowering smell of spices/lemongrass added by unscrupulous sellers to “disguise” it.
3. Signs that "Expose" Chemicals During Cooking
Often, a perfect appearance at the market stall can deceive the eye, but the true quality of snails reveals itself most clearly when you start preparing them.
First is the snail washing stage: For snails that are safe to eat, the rinse water is usually naturally slightly cloudy, with no unusual foam. By contrast, if the rinse water develops a lot of white foam and a persistent slimy feeling remains on your hands despite washing, this is a telltale sign of industrial detergent residues on the snails.
Entering the cooking stage, the difference becomes even more pronounced. When subjected to high heat, "clean" snails shrink moderately, retain their crisp, chewy texture, and release a distinct aroma, leaving behind a clear and subtly sweet broth. In contrast, snails soaked in water glass (liquid sodium silicate), having absorbed chemical-laden moisture, shrink drastically upon cooking, becoming significantly smaller than when first purchased. Furthermore, the meat often turns mushy, bland, and completely devoid of sweetness, while the broth may give off an unpleasant stench or a strange chemical odor.
Carefully observing these changes during cooking not only helps you assess food quality, but also provides a basis for deciding whether to continue trusting that shopping venue in the future.
Prioritize buying live snails from reputable shops.
4. Tips for safe meals
To protect your family, it is best to:
Ưu tiên mua ốc sống: Buying whole snails, soaking them in rice-washing water, and extracting the meat yourself is the safest method.
Choose reputable suppliers: Buy from supermarkets or clean food stores with inspection certificates.
Thorough preparation: If buying pre-cleaned snails, rub them thoroughly with salt, lemon juice, or vinegar. Natural acids will help neutralize some impurities and eliminate odors effectively.