Be careful when buying sweet dates
Simple steps to identify 'saccharin dates'
Purpose of the experiment
In this experiment, according to the secret recipe of "saccharin jujube" spread on the Internet, we deal with the jujube and explore the method of distinguishing "saccharin jujube" from "normal jujube".
Experimental method
Green jujube was used as raw material. After hot water scalding and saccharin sodium solution soaking, normal jujube and saccharin jujube were stored at room temperature.
experimental result
1. After treatment, the jujube slowly appears red. After 10 hours, most of the jujubes become dark red, and the red color is relatively uniform, but the color is not bright.
2. The surface of 'saccharin jujube' has a kind of sticky feeling, while the surface of normal jujube is relatively smooth. When 'saccharin jujube' is pinched open by hand, it is found that the skin and flesh of jujube are separated.
3. Lick the 'saccharin date' skin with the tip of tongue to feel the obvious sweetness, and taste the bitter. After washing with water, the sweetness of 'saccharin dates' will be significantly reduced.
4. One day later, 'saccharin jujube' became soft with obvious surface wrinkles, while the normal jujube was relatively hard with smooth surface.
Laboratory recommendations
This experiment proved that green jujube can be turned into sweet red jujube after certain treatment. Because saccharin sodium is harmful to human health, consumers should pay attention to it when they buy fresh jujube.
First of all, it depends on the color. "Saccharin date" is dark red all over, the color is not bright, but the color of natural date is bright and uneven.
Next, touch it with your hands. The surface of 'saccharin jujube' is sticky, and it will be soft when kneaded by hand. Finally, you can lick it with your tongue. The skin of 'saccharin dates' is very sweet and even bitter.
In addition, some studies show that the polyphenol content and antioxidant capacity of half red date are higher than that of the whole red date. Therefore, no matter from the perspective of nutrition or safety, the jujube with red in green is the best choice.
How to eat jujube in autumn
Experts said that we often eat fresh dates, dried dates, honey dates and drunk dates. Fresh jujube is not only sweet, crisp and juicy, but also nutritious. The content of vitamin C is the highest, 243 mg of vitamin C per 100 g. In addition, it contains much more carotene than other jujube products.
However, fresh jujube will lose its crispy taste in a few days under normal temperature. For the convenience of preservation, fresh jujube can be dried to make dry jujube. However, when the jujube is dried, there is less vitamin C dissolved in water, which also has a great impact on other nutrients. However, the calcium content of dry jujube is higher than that of fresh jujube.
Drunk jujube is mellow, crisp, sweet and pleasant, and can be preserved for a long time, but the nutritional loss of drunk jujube is greater, and almost all of its vitamin C is destroyed. However, due to a large amount of water loss after air drying, and after soaking in alcohol, the mineral content of jujube increased, so the calcium content of jujube is the best of these jujube products, with 75 mg per 100 g. It is another way to preserve fresh jujube, but the heat of jujube is higher, 78.9g carbohydrate per 100g.
Fresh jujube is best eaten raw, which is conducive to the absorption of nutrients. Dried jujube is more suitable for porridge or soup, which can release the nutrients well. Compared with fresh date and dry date, honey date has the least nutrition and the highest sugar content. It is also best used to cook porridge, which can dilute the sugar concentration in honey date.
In autumn, it is relatively dry, and the jujube is warm and sweet. It enters the spleen and stomach meridian, and has the functions of nourishing the spleen and stomach, supplementing qi and promoting fluid, nourishing blood and calming nerves, and detoxifying drugs. Therefore, it is also very effective to use red dates for dietotherapy in autumn. Here are two recipes of red dates for dietotherapy:
① Jujube 60 grams, celery 200 grams wash water boil, daily sub consumption, prevention and treatment of hypertension, dizziness, headache.
② Red jujube 5g, tremella 10g, proper amount of white sugar. Wash the red jujube and tremella, stew them until they are ripe and soft, and eat them every morning and night with white sugar. It can prevent and cure neurasthenia caused by heart blood deficiency, and achieve the effect of Nourishing Yin, nourishing blood, and calming nerves.
Red jujube is a good tonic for weak body. But jujube skin is not easy to digest, so we must chew carefully and swallow slowly. At the same time, it is necessary to eat it in proper amount. If you eat too much, it will cause excessive stomach acid and abdominal distention.
Eating fresh dates will hurt your stomach
Compared with dried dates, fresh dates are more tender and refreshing, and can't be accepted once eaten. However, Wang Xingguo, director of Nutrition Department of Dalian Central Hospital, reminded that fresh jujube should not be eaten too much, otherwise it will hurt the stomach and intestines.
This is because, first of all, the moisture content of jujube is low. The moisture content of most fruits is 80% - 90%, while that of jujube is only 67%. So eat more other fruits, in fact, most of them are water. And when we eat more jujubes, we have more 'dry goods'.
Secondly, the dietary fiber content of jujube is very high, which is significantly higher than other common fruits. For example, the average dietary fiber content of grape is 0.4%, apple is 1.2%, and jujube is as high as 1.9%. Dietary fiber (especially insoluble cellulose) cannot be digested in the stomach and small intestine. A small amount of dietary fiber can promote defecation and prevent constipation. A large amount of dietary fiber can stimulate the gastrointestinal tract and cause gastrointestinal discomfort.
How many fresh dates are suitable for a day? Generally speaking, one handful a day can meet the needs of the human body. If there is no inflammation, ulcer or wound in the stomach, it doesn't matter if you eat more.
However, even if the stomach is healthy, different people have different tolerance to some irritant substances. Therefore, people with bad stomach must eat less fresh dates. People with healthy intestines and stomachs, it's better to eat slowly. If you feel abdominal distension, you should stop in time.
Have you learned how to distinguish dates that have flavors?