The Secret to Detecting Chemically-Enhanced Noodles Lies in a Few Drops of Fish Sauce

Introducing a unique and effective way to identify clean and chemical-free rice noodles. While we often rely on visual cues to determine the quality of rice noodles, there is a clever trick that utilizes fish sauce. This simple yet ingenious method will revolutionize the way we assess the freshness and safety of our favorite delicacy.

0
125

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

Frequently asked questions

A quick and easy way to test for chemical enhancement is to add a few drops of fish sauce to the noodles. If the noodles turn a milky white color, then they have likely been treated with chemicals. This reaction is caused by the presence of alkali, which is often used to artificially enhance the texture and color of noodles.

Consuming chemically enhanced noodles can have negative health consequences. The alkali used in the treatment process can increase the pH level of the noodles, making them unsafe to eat. Additionally, the chemicals used may include harmful substances such as formaldehyde, which is a known carcinogen.

Yes, besides the fish sauce test, you can also look for certain indicators on the packaging or product itself. For instance, chemically treated noodles may have an unnatural shine or gloss to them. The texture may also feel unusually smooth or slippery. It’s important to be vigilant and always check the ingredients and manufacturing processes of the food products you consume.

There are plenty of healthy alternatives to choose from. Look for noodles made with natural ingredients, such as eggs, wheat, and buckwheat. These options are free from artificial chemicals and provide a more nutritious and wholesome dining experience. Freshly made noodles from reputable sources are always a safer bet.

When selecting fish sauce for this test, opt for a reputable brand that uses traditional fermentation methods. A good-quality fish sauce should have a strong, pungent aroma and a deep amber color. It should also be free from any cloudiness or sediment, indicating that it has been properly filtered and aged.
You may also like

Is the Iridescent Beef Truly Dangerous?

When enjoying a hearty bowl of beef pho, you may have noticed a shimmering, iridescent green hue on the sliced beef. This unexpected rainbow-like color might spark concerns about spoiled meat. So, what’s the truth behind this curious phenomenon?

The Secret to Spotting Chemically Sprayed Vegetables

Introducing the art of discerning the true nature of vegetables: just because they look good, doesn’t mean they are nutritious and safe to consume. Uncover the secrets to identifying chemical-ridden produce and take control of your health today. Learn how to separate the wheat from the chaff, or rather, the chemical-free greens from the rest. It’s time to become a vegetable connoisseur and ensure a healthier, happier you.

Why You Should Never Store Onions in the Fridge?

Preserving onions in the refrigerator is a big no-no – but do you know why? It’s time to uncover the reasons why your onions should never see the inside of your fridge.

5 Meat Preparation Mistakes That Could Impact Your Family’s Health

When it comes to meat preparation, it is imperative that you master the safety guidelines to protect your health and that of your loved ones. We will shed light on the common mistakes people make during meat preparation and provide insights to help you avoid them.

Mastering the Art of Chopping Board Care: A Guide to Longevity and Sanitation

Introducing the ultimate guide to cutting board care: unlock the secrets to maintaining and preserving your chopping boards, ensuring they remain pristine and durable. Discover the dos and don’ts of chopping board maintenance, and elevate your kitchen game with these expert tips and tricks. Learn how to care for your cutting boards like a pro and impress your guests with your culinary prowess.