The shape of yacon is like sweet potato, the flesh is like pear, and the color is white or yellowish. If the pulp turns green, the main reasons are as follows:

1, too long contact time with air

Yacon contains a chemical component called tannin, also known as tannic acid. This substance will be oxidized after contacting with air for a certain period of time, and the phenolic substances in tannin will produce quinone polymers and form pigments, which will turn yacon into green or brown.

2. Pot-stewed.

Tannic acid in yacon will react with iron to form ferrous tannic acid, but ferrous tannic acid is unstable. At high temperature, it will react with oxygen in the air to generate trivalent iron, which may appear brown, brown and green.

If the yacon turns green due to the above two conditions, it can still be eaten, because the oxidation discoloration component is mainly tannic acid, which is non-toxic and will not produce harmful substances to the human body, so it will have adverse effects on the human body. If the green part affects appetite, you can also cut off the green part with a knife and continue eating.

Extended data:

What are the taboos for eating yacon?

1, spleen and stomach deficiency and cold should not be eaten.

Yacon is cold. Generally speaking, it is not recommended for people with spleen-stomach deficiency and cold symptoms, otherwise it may aggravate the accumulation of cold in the gastrointestinal tract, leading to the aggravation of the original gastrointestinal discomfort, dyspepsia, diarrhea in loose stool and other symptoms.

2. People who are allergic to yacon should not eat it.

A few people are allergic to yacon, which may lead to diarrhea, increased heart rate, decreased blood pressure, and even unconscious and shock. If you are an allergic person who eats yacon for the first time, it is recommended to eat a small amount first, observe for half an hour, and continue eating if there is no discomfort.