Walnut is a kind of common nut, and it is troublesome to eat. It needs a special walnut clamp. But if you peel the fresh walnut by hand, will your hand turn black after eating it? So how to clean it?
1. Why do hands turn black
Walnut is mild, sweet and bitter. Tannins, gallic acid and other substances contained in walnut skin will turn black after being oxidized. These black substances can be colored, which is a good coloring agent for hair. Eating walnut hand turns black because of these black oxides, so it will turn black. What should we do?
2. Natural abscission
The skin is stained with the black oxide on the walnut. As long as you wash your hands and clothes frequently, it can be tested that the skin epidermal cells of the human body metabolize by themselves, aging and falling off slowly.
3. Vinegar cleaning
The way to remove the black color of the walnut skin on the hand is only the strong acid substances can be removed most quickly. However, the strong acid substances are not suitable for human skin, which will cause corrosiveness to the skin. Therefore, experts suggest that vinegar, which is not so strong in acidity, can be used instead. Scrub it with vinegar for 5 minutes, and then wash it with water.
4. Grape juice cleaning
When it is found that there is black substance attached to the peeled walnuts, you can try to eat some grapes. During this period, the brown or even black walnuts on your hands will be unconsciously cleaned by the fruit acid in the grape juice, and the lemon juice can also be metabolized to clean the grape juice.
5. Tips
Generally, fresh peeled walnuts will be stained with these black substances if peeled by hand, which is very difficult to clean. To avoid this situation, you can wear rubber gloves. The opponent should take protective measures to prevent the hand from turning black at the source, but it is not recommended to use disposable plastic gloves, because it is easy to break, and finally the hand will be colored, and the gloves with good quality should be selected.
The taboo of eating walnuts
1. According to the theory of food compatibility: walnuts can not be eaten with pheasant meat, pneumonia, bronchiectasis and other patients should not eat them.
2. Walnuts should not be eaten with wine. According to Song Ma Zhi's "Kaibao Materia Medica", drinking and eating walnuts can cause hemoptysis. It may be because walnut is hot, eat more and produce phlegm for hot work, and white wine is also hot, both of which are easy to cause blood fever. Especially people with hemoptysis should not be allowed. Such as bronchiectasis, tuberculosis patients, drinking white wine can cause hemoptysis, not eating with walnuts, can also cause disease.
3. Diarrhea, deficiency of yin and hyperactivity of fire should not be taken.
4. It is not suitable for the patients with phlegm heat and cough, loose stool and diarrhea, internal heat and phlegm dampness.
Chinese health care reminder: in addition, people who are on fire should not eat; walnut has the effect of defecation, but walnut shell boiling water can treat diarrhea. Walnut kernel contains tannic acid, which can be combined with iron and calcium to reduce the efficacy. When eating walnuts, you should drink less strong tea; some people like to peel off the brown thin skin on the surface of walnuts, which will lose some nutrients, so don't peel off this layer of skin.