When the yam is peeled, the needle-like crystals of calcium oxalate in the mucus stimulate the pores of the human skin, thus causing itchy hands.

(Picture taken from Photo AC)

[Health Channel/Comprehensive Report] When yam is peeled, the needle-like crystals of calcium oxalate contained in the mucus may irritate human skin pores and cause itchy hands.

If you want to eat yam but are afraid of itching hands, what should you do?

The Agriculture and Food Administration explained that there are two methods. The first is to wear gloves or plastic bags to completely prevent contact with the yam mucus; the second method is to peel the skin while washing with water to dilute the mucus and prevent excessive contact with the mucus.

3 ways to relieve itching after touching yam

If the skin is itchy after contact with yam, the Agriculture and Food Administration has posted on the Facebook page "Xianxiang Nong YA - Agriculture and Food Administration" that it can be relieved by flushing, ice compress or washing hands with salt water. In case of allergies In severe cases, seek medical attention and apply medicines according to the doctor's instructions.

Please read on...

Polyphenol oxidase makes yam black after peeling

As for why the peeled yam turns black?

According to the Food and Drug Administration, browning occurs after peeling yam, mainly due to the effect of polyphenol oxidase.

Remember to put the chopped yam in salt water immediately when cooking on the same day to avoid oxidation.

If there is too much to eat before cooking, the following methods can save and prevent the cut from turning black:

Step 1. Soak rice wine, vinegar or lemon juice at the incision.

Step 2. Store in an airtight container.

How to handle cut or uncut yam

●Long strips and uncut pieces: After soaking, blow dry the cut, wrap it with white newspaper, and place it in a cool, ventilated place.

●Cut into pieces: After soaking, wrap it in a plastic wrap (bag), isolate the air, and store it in the refrigerator.

cooking tips

1. Soaking in vinegar water can remove the earthy smell (1 vinegar: 10 water).

2. Cut raw food lengthwise (strip), soak in vinegar water, the taste is crisp and moist.

3. Cross-cut (round slices) of hot food, cut off fibers, increase sweetness, and make the taste more mushy.

4. After cleaning, the fibrous roots can be cleaned with a stove, and can be directly ground with skin, fried or deep-fried.

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  • Yam

  • calcium oxalate

  • itchy skin

  • slime

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