Can I still eat yam if it changes color?

There may be two reasons for the discoloration of yam. Different reasons are directly related to whether the yam can still be eaten after it changes color. For example, if the yam changes color due to long-term storage or damage to the yam itself, it is usually not edible. Eating it will cause diarrhea, and in severe cases it will cause poisoning. If the discoloration is caused by peeling, then there is no problem, it is usually just simple oxidation.

1. It is normal for yam to change color after peeling. Yam needs to be soaked in salt water immediately after peeling or slicing to prevent oxidation and blackening. Fresh yam is mostly used for consumptive cough and diabetes, and can be fried and eaten to treat spleen, stomach and kidney deficiency. Don't eat yam raw, because it contains certain toxins. Yam should not be taken together with alkaline drugs. Yam, also known as Dioscorea batatas, is also known as Huai yam, Huai yam, native yam, mountain yam, yam, and Yuyan. A perennial herb with creeping stems, often purple, cylindrical tubers, opposite leaves, ovate or elliptical, milky white flowers, and dioecious plants.

2. It is edible. Yam contains a large amount of divalent iron ions (ferrous iron). We all learned about it in junior high school chemistry. Divalent iron will be oxidized when it encounters oxygen in the air, so it changes color. As long as it is not kept for too long, there is no problem eating it.

3. It is normal for yam to change color after peeling. After the yam is peeled and comes into contact with the air, the mucus on the surface undergoes an oxidation-reduction reaction with the air, resulting in a light yellow color. You can still eat yam like this and it will not cause poisoning.

4. If the fresh yam on the market changes color or becomes moldy, it is of course not edible. If you mean it changes color after peeling, it is the result of oxidation due to contact with air, and it is edible. The dried yam slices purchased from the pharmacy can still be eaten if they are dry and slightly yellow, but their medicinal efficacy will definitely be affected.

5. The same goes for yams and apples. They will change color and turn black because of oxygen. If you don't want it to change color, just peel it and don't leave it in. If you really can't fix it right away, just soak it in water and it won't change color. But it’s okay if it turns black, and it won’t affect the nutritional content, so you don’t need to worry too much.

6. The main component of yam is starch, like potatoes and lotus root. Starch easily turns red in the air, so to avoid discoloration of the cut yam slices, it is recommended to soak them in water. They can be eaten after turning red.

7. Because some substances in the yam are exposed to air and are oxidized to produce colored alternative substances, to prevent it from changing color, just avoid direct contact with air, such as soaking it in water. Suggestion: Add a little salt to the peeled and washed yam and mix it, so that the peeled yam will not change color.