YamIt is a very common and nutritious food, rich in nutrients, with high nutritional value and good eating properties, which is very popular.Can purple-colored yams be eaten?

Generally, whether purple-colored yams can be eaten depends on the specific situation.If the yam naturally turns purple, it can still be eaten. If the yam turns purple due to prolonged spoilage, it should not be eaten.Let's take a closer look!

Can purple-colored yams be eaten?

Whether purple-colored yams can be eaten depends on the specific situation.

Purple-colored yams can be eaten.

Some yams have a purple-colored skin, which is related to the soil in which they are grown and the variety. The most common isIron yamAfter peeling, the yam flesh also has a light purple color; this purple yam can be eaten with confidence.Yams contain phenols and oxidase, and the air contains oxygen. After peeling the yam, a reaction occurs, and the resulting quinones will be brown or black. Light oxidation also appears as a pale purple color, which can be eaten.

Purple-colored yams that are not normal cannot be eaten.

Yams andSweet potatoesandPotatoescan also be stored for a long time, but it is important to pay attention to the loss of water in the yams. If the yams are stored for too long, a large amount of water will be lost in the yams, or some will start to rot, resulting in the yams turning purple. This type of yam contains certain toxins and is not suitable for consumption.

What does it mean for yams to turn purple?

Purple-red yams after peeling are normal because iron yams contain a lot of elements.

1. Purple is a characteristic of iron yams. Most yams do not have purple color, which is rust, and there is no problem. You can see it without peeling, and after peeling, there is a light purple color, which is normal.

2. Purple color usually appears on the inside, and you can see it by peeling the skin. This purple color is usually only in winter, and it disappears after the weather gets warmer.

3. The purple and brown changes mainly occur under three conditions: polyphenols, polyphenol oxidase, and oxygen.After peeling the yam, polyphenols and oxygen in the yam react to produce quinones, which further oxidize and polymerize to form brown and black pigments.

How to prevent yams from turning purple?

Prevent oxidation

After peeling the yam, it will oxidize and change color when it comes into contact with the air. Therefore, after peeling the yam, it should be quickly placed in salt water,Vinegaror soak in water. Even sprinklinglemonwater can also prevent oxidation and discoloration.

Do not store for a long time

Although yams can be stored for a long time, pay attention to the loss of water during storage. At the same time, it should be avoided from being exposed to light and heat to prevent sprouting. Purple-heart yams and sprouted yams contain toxins. Good storage methods can prevent discoloration, and eating them as soon as possible can avoid poisoning.

Things to note when eating yams

1. Yams are high-starch foods, rich in energy, so yams should not be eaten in excess to avoid obesity and highbloodsugar.

2. Yams contain some allergensprotein, which are allergens, so people with allergies should not eat yams to avoid skin itching, throat swelling, and difficulty breathing.Contains allergenic substances, so people with allergies should not eat lotus root to avoid skin itching, throat swelling, and difficulty breathing.