We all know that,Sweet potatoesare a popular food in autumn, with various ways to eat them.Roasted sweet potatoesare one of the most popular ways to eat them, and many people enjoy eating roasted sweet potatoes.So, are roasted sweet potatoes poisonous?

Generally, roasted sweet potatoes are not poisonous, but many street vendors use coal or chemical barrels to roast sweet potatoes, which can produce harmful substances and are not good for human health.Let's take a closer look!

Are roasted sweet potatoes poisonous?

Roasted sweet potatoes are not poisonous.

Some people are worried that the surface of roasted sweet potatoes is charred, and whether it contains carcinogens.This is actually the caramelization reaction of sugar in sweet potatoes at high temperatures, which will gradually turn brown or dark brown. It is not poisonous and will not harm health. It can be eaten.

Are sweet potatoes roasted in chemical barrels poisonous?

If the original contents of the chemical barrel are things that volatilize, such as alcohol and gasoline, they will volatilize over time, so there is no need to worry about being harmful.However, if the original contents are non-volatile and poisonous substances, then there will be safety risks.In addition, most street vendors selling roasted sweet potatoes are unlicensed, and it is recommended that everyone buy roasted sweet potatoes from regular stores or make them at home.OvenRoast, set the temperature and time, which is safer.

Dangers of eating roasted sweet potatoes on the street

Roasting sweet potatoes with coal produces toxins

Sweet potatoes roasted with coal are mostly roasted with coal, which produces a large amount of sulfur dioxide and carbon monoxide when burning, as well as arsenic and other toxic substances.After roasting sweet potatoes, they are easily contaminated with the above toxic substances. Eating contaminated sweet potatoes can cause poisoning, and in severe cases, it can damage the digestive and respiratory systems.In addition, because most street vendors selling roasted sweet potatoes do not have hygiene facilities, the roasted sweet potatoes are easily contaminated.

The roasted sweet potato stove may be a chemical barrel

Most street vendors roasting sweet potatoes use discarded iron barrels, which are either gasoline barrels or diesel barrels, or chemical barrels. These iron barrels are not thoroughly disinfected, so the hygiene conditions cannot be guaranteed.Some iron barrels also contain many chemical substances, which are harmful to the human body.After roasting sweet potatoes in iron barrels at high temperatures, they absorb many chemical substances in the barrels. Eating roasted sweet potatoes will harm the respiratory and nervous systems.

Black spots on sweet potatoes are harmful to the human body

Some street vendors selling roasted sweet potatoes now roast black-spotted sweet potatoes and sell them as good sweet potatoes.This is harmful to people who eat sweet potatoes.Experts say that sweet potatoes infected with black spot disease will excrete two toxins, potato ketone and potato ketone alcohol, which will make sweet potatoes harden and become bitter. Boiling, steaming, or roasting cannot kill the black spot disease.Sweet potatoes with brown and dark brown spots, after grilling, the original obvious black spots will no longer be obvious, ordinary people cannot identify.After eating black-spotted sweet potatoes, some people may experience vomiting, diarrhea, and other symptoms, and in severe cases, they may have high fever, shortness of breath, convulsions, vomiting blood, coma, and even death.Therefore, people who have eaten black-spotted sweet potatoes should immediately induce vomiting or diarrhea, and those with severe poisoning symptoms should be sent to the hospital for treatment.Experts recommend: People who often eat street-roasted sweet potatoes should be aware of the three dangers. To protect your health, be cautious when eating street-roasted sweet potatoes.If you really like to eat roasted sweet potatoes, you can make it yourself.You can go to the supermarket to buy fresh and clean sweet potatoes with smooth skin, then roast them in a microwave.About half a pound of sweet potatoes can be roasted for 15 minutes.

Roasted sweet potatoes are safe to eat.When eating street-roasted sweet potatoes, pay attention to four pointsChoose sweet potatoesChoose sweet potatoes with smooth, clean, and shiny skin, and do not buy sweet potatoes with uneven surfaces and small black holes, which may be rotten inside.Identify the taste according to the appearanceDo not choose round and plump ones, but choose long and straight ones, which taste better.The outer skin should be red, and white skin sweet potatoes with red hearts are more flavorful, like

Pumpkin

, which is not very sweet;

Red skin is sweet and chewy.

Sweet potatoes are generally divided into yellow-fleshed and white-fleshed.

Yellow-fleshed sweet potatoes are longer in shape, with pale pink skin, and contain more sugar, which turns red when cooked, and tastes sweet and delicious.White-fleshed sweet potatoes are rounder in shape, with deep red or purple skin, and contain more starch, which turns white when cooked, and tastes sweet and fluffy.You can choose according to your personal preference.Do not eat the skinThe freshly roasted sweet potatoes are fragrant and delicious, and some are even roasted to a sticky state.

Eating the skin of sweet potatoes is also popular, and many people eat the skin together.Experts say that it is best not to eat sweet potato skins, because sweet potato skins contain a lot of alkaloids, which will cause gastrointestinal discomfort.Especially sweet potato skins with black spots are not allowed to be eaten, which can cause poisoning.Choose coal or contaminated

Sweet potatoes are contaminated with toxic substances when roasted with coal, and some coal also contains radioactive substances and arsenic.

Eating roasted sweet potatoes can cause chronic arsenic poisoning, and in severe cases, it can damage the digestive and respiratory systems.It is recommended to roast sweet potatoes at home, choose mature sweet potatoes, and can also roast them to a sticky state, which is delicious and fragrant.

Experts say that roasted sweet potatoes should not be eaten with the skin, as the sweet potato skin contains a lot of alkaloids, and excessive consumption will cause gastrointestinal discomfort.In particular, sweet potato skins with black spots should not be eaten, as they can cause poisoning.

Choose sweet potatoes from the street that have been exposed to coal or pollution.

Sweet potatoes are not only contaminated by toxic substances in the smoke of burning coal, but some coal also contains radioactive substances and arsenic, which are toxic and harmful.Eating such roasted sweet potatoes can cause chronic arsenic poisoning, and in severe cases, it can damage the digestive and respiratory systems.It is recommended that everyone roast sweet potatoes at home, choose ripe sweet potatoes, and roast them until they are "sugar-oil", which is delicious.