Why does rice turn yellow? What causes rice to turn yellow?

Rice has its original normal color, and if it appears yellowish, we call it yellowish rice. The yellowing of rice is due to the fact that during the storage process, due to its high moisture content, the rice generates heat under the action of enzymes, which causes mold to multiply, mildew and yellow. The mold contains aflatoxin produced by the fungus, which is a collective name for the toxic metabolites of Penicillium island, Penicillium citrics, and Penicillium aeruginosa.

Aflatoxin poisoning symptoms are fever, abdominal pain, vomiting, loss of appetite, etc., which is one of the main risk factors for liver cancer, liver lesions, liver enlargement, liver pain, jaundice, splenomegaly, ascites, lower limb edema and abnormal liver function after 2-3 months, and may also be accompanied by heart enlargement, pulmonary edema, and even spasm, coma, etc., most patients will have rectal, liver, stomach hemorrhage in the late stage.

Medical experts pointed out that although the one-time toxicity of eating "carcinogenic rice" is not so great, long-term consumption will undoubtedly cause cancer. Because aflatoxins are the strongest biological carcinogens ever discovered, tests have shown that the shortest time it takes to cause cancer is only 24 weeks.

After harvesting the rice, it cannot be dried in time due to rain. Storing the wet grains together will cause the rice to turn yellow. Yellow rice is also yellow and is called yellow rice. Yellow rice is generally not toxic, but its nutritional value and quality are inferior to white rice, and it is also prone to contamination with mold under the right conditions.

It is best to buy rice in small quantities and store it in a dry and ventilated place. In the north, rice can usually be stored for 3 to 6 months, while in the south, it is best not to exceed 3 months.

If it absorbs water and swells, it is not in the way, and generally polished rice will not turn yellow, only brown rice will.

Soak it for too long, and there is no harm in eating it, add some vinegar.

It's just a bit of surface oxidation.

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Summary. Therefore, when we cook rice, it is okay to eat it if it turns yellow if it does not change its taste, and if it does not change its taste, do not eat it. If the smell changes, there will be certain harmful substances, which is not good for the body.

What causes rice to turn yellow?

Yellowing of rice is due to the fact that the rice has been left for too long or because of the water. The reason why the cooked rice turns yellow may be due to the rice itself, which may be due to the change in color on the inside of the rice after being left for too long, or because the water put in the rice when cooking is not pure water, and some well water or water from the water pipe will also have some yellowing.

If there is a phenomenon of yellowing of rice, it may also be that there is less water, and if the rice is boiled, it will make the rice yellow, so when cooking rice, you should choose to add appropriate water and control the time of cooking rice to make delicious rice.

Therefore, when we cook rice, it is okay to eat it if it turns yellow if it does not change its taste, and if it does not change its taste, do not eat it. If the smell changes, there will be certain harmful substances, which is not good for the body.

There are several reasons why rice will turn yellow after steaming for a long time: 1. Rice is aged rice with aflatoxin. Peel the fresh garlic and fry it in oil for 10 minutes with a small amount of rice, the garlic is white and there is no mildew.

The garlic has turned red, indicating that there is a large amount of aflatoxin, and it is recommended not to eat it again. 2. Rice contains a large amount of starch, which is caused by oxidation reaction with oxygen in the air for a long time. There is no problem with consumption, and it is recommended not to cook the rice for too long later when cooking.

3. The problem of the pot, if it is an iron pot, there may be rust. There is no problem with eating, and the pot should be washed frequently in the future.

Good evening, dear, there are several possible reasons for the yellowing of rice: 1Pigments:

Rice contains pigment substances, the main components of which are carotene and carotenoids. These pigments are sensitive to factors such as light and temperature, and during storage, they are affected by environmental factors such as sunlight, oxygen, and humidity for a long time, and the color is easy to change, making the white rice yellow. 2.

Cooking transparency: If the rice is cooked too soft or stored for too long, it is also easy to cause the rice to turn yellow. This is because the starch inside the rice grains gradually becomes transparent, absorbing oxygen from the air, which reacts to form some unstable chemicals, which in turn turn turns the rice yellow.

3.Water quality problems: The water quality is poor and contains excess iron or calcium, and it is easy to cause the rice to turn yellow and rough during the heating process.

4.Stale fragrant rice: In the case of incorrect storage and preservation conditions, the packaged fragrant rice may have expired or aged, resulting in deterioration.

These factors can make the rice yellow.

The yellowing of rice is caused by moisture in the rice.

Rice is easy to be contaminated by mold during storage, and mold will multiply in large quantities under suitable conditions and produce toxic metabolites of acacia abohydrate, which will cause rice to turn yellow, and this kind of rice is also called liquid loss yellow rice.

How to store rice:

When buying rice, it is necessary to do small quantities many times and store it in a dry and ventilated place. In the north, rice can generally be stored for 3 to 6 months, and in the south, it cannot be stored for more than 3 months. When storing rice in a household rice tank, dry the container thoroughly before filling it in and cover it with a lid.

The amount can be bottled in a cola bottle, placed in a dry and ventilated place, and avoid high temperature and light.