Bún is a familiar dish to Vietnamese people. Typically, it takes about 5 to 7 days to make a clean batch of bún, but due to the high demand for this type of food in our current lifestyle, some bún manufacturers have used chemicals to increase profits and shorten the bún-making process.
The chemicals commonly used in bún are tinopal fluorescent agents, funfit bleaching agents, and borax. These substances are listed as additives and are prohibited for use in food.
Since this is a handmade food product, it is very difficult to control the ingredients and additives used. Therefore, it is challenging to distinguish chemically contaminated bún by sight or taste alone. However, you can examine the color of the bún strands to make an assessment.
The main ingredient for making bún is rice starch, and clean bún strands are usually ivory-white in color and naturally crisp. Illustrative image.
– Elasticity: To distinguish whether bún contains chemicals or not, homemakers should observe that clean bún strands have natural elasticity and tend to break, crumble, or snap when pulled or twisted with some force. When touched, the bún strand will feel slightly sticky and have the soft, supple characteristic of rice flour. In contrast, bún strands treated with chemicals are often chewier, crisper, and more elastic, lacking or having minimal stickiness and the soft texture typical of rice flour.
– Observe the color: Since it is made from rice flour, the natural color of the bún strands is ivory-white, slightly opaque, and not bright white like chemically treated bún.
– Observe the gloss: Another sign to differentiate clean bún from chemically treated bún is the glossiness. Many manufacturers use chemicals to make the bún strands more appealing and attractive to customers. This type of bún is usually bright white, shiny, and more elastic, while clean bún lacks gloss and has a dull white appearance.
– Taste test: In addition to visual observation, there is also a difference in taste between clean bún and chemically treated bún. Clean bún strands usually have a mild acidic smell, which is the natural acidic aroma of fermented rice flour, not an indication of spoilage. In contrast, bún strands containing chemicals have been bleached and deodorized, so they no longer have this characteristic acidic aroma. This is an important sign to distinguish clean bún from chemically contaminated bún.
– Distinguish with fish sauce: With this helpful tip, you can use fish sauce to differentiate clean bún from chemically treated bún. Before a meal, try mixing a small amount of bún into a bowl of fish sauce; if the bún strands soften and quickly absorb the fish sauce, they are clean. On the other hand, chemically treated bún will remain firmer and absorb less fish sauce due to the chemical coating preventing the sauce from penetrating the strands.
To know for sure if bún contains chemicals, it must be tested in a laboratory. Bún treated with bleaching agents and borax is usually bright white and aesthetically pleasing but can cause stomachaches, diarrhea, poisoning, and, in the long run, lead to liver and kidney failure and even cancer.
If the bún shows signs of chemical contamination, it should not be consumed. The harmful chemicals in the bún can cause acute or chronic poisoning, depending on the amount of toxins ingested.
These toxins can damage the digestive system and the mucous membranes of the intestines, leading to intestinal and gastric ulcers. In severe cases, long-term accumulation of these toxins can cause liver and kidney failure and even cancer.
Since bún is made from rice, it can easily turn sour, so it should be stored at low temperatures or in a cool, well-ventilated area to prevent food poisoning. Illustrative image.
There are several types of bún on the market:
– Bún rối (Tangled Bún): After being removed from the boiling water, the bún strands are placed in a container in a relatively tangled manner, without a definite shape. Bún rối is the most common type and is suitable for various dishes.
– Bún lá (Leaf Bún): The bún strands are twisted into cords with a diameter of about 4-5mm and a length of 30-40 cm. When eating, these bún “leaves” are cut into short sections.
– Bún nắm (Clumped Bún): The bún strands are clumped into small, flat cakes. This type is less common than the previous two. Bún vắt and bún nắm are suitable for dipping dishes, such as cold snail bún or tofu shrimp paste bún.
According to Nguoiduatin
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