Why do onions have a flavor and sweetness when heated?

The main reasons why onions produce a fragrant and sweet taste when heated are as follows:

1.The sulfides in onions are broken down when heated to produce scented chemicals such as alliinase.

2.The starch in the onion is converted into sugar when heated, giving the onion a sweeter taste.

3.The fructose chains in onions react fully during the heating process, giving off a rich caramel flavor that includes sweet, salty, and nutty layers.

Therefore, the aroma and sweetness produced by onions when heated are the result of a combination of factors.

Dipropyl sulfide, which is abundant in onions, is degraded by heat to form propyl mercaptan, which is more abundant than sucrose.

It is also sweet, so it will produce a fragrance and sweetness when heated.

Have the freedom to choose, don't be forced by life to do something that doesn't pay off. It is very happy to eat and drink alone, but if you want to live with dignity, you can buy food and wear it once, and you can cure the chaos.

The main reasons for the sour taste of onions are as follows:

1.Substance metabolism process: Onions contain compounds called sulfuric acid amino acids, which produce sulfides and sulfuric acid when they come into contact with oxygen in the air during cutting, and the production of these compounds and acids can cause onions to become sour.

2.Moldy spoilage: If the onion is not stored properly, it can become contaminated with mold, causing it to rot and develop a sour taste.

3.Allergic reactions: Some people will have allergic reactions when consuming onions, which may cause symptoms such as redness, rashes, nasal congestion, and watery eyes, which may also make onions feel sour.

4.How to cook lead skin: Some restaurants will first add sugar to the onion with white vinegar to make scrambled eggs, or add sugar to lemon juice to marinate it first to increase the sweet and sour taste, and some people will put a little sweet and sour when stir-frying.

Overall, there can be a variety of reasons why onions tend to be sour. If you have any doubts about the sour taste, it is recommended to contact a professional food testing agency for testing.

Onions are all hair products.

A lot of meat is also hairy

1. Edible mushrooms mainly include mushrooms, shiitake mushrooms, etc., and eating this kind of food is easy to cause wind and yang, triggering liver yang headache, liver wind dizziness and other chronic diseases, in addition, it is also easy to induce or aggravate ** sores and ulcers.

2. Fishy mainly includes hairtail, yellow croaker, pomfret, mussel, shrimp, crab and other aquatic products, most of this kind of food is salty, cold and fishy, for people with allergies, it is easy to induce allergic diseases such as asthma and urticaria, and at the same time, it is also easy to cause sores and sores and other diseases.

3. Vegetables mainly include bamboo shoots, mustard greens, pumpkin, spinach, etc., which are easy to induce sores and ulcers.

4. Fruits mainly include peaches, apricots, ginkgo, mangoes, bayberry, cherries, lychees, melons, etc., the predecessors have pointed out that eating more peaches is easy to produce heat, carbuncles, sores, gangrene, boils, insects, and boils.

5. Poultry and livestock mainly include roosters, chicken heads, pig head meat, goose meat, chicken wings, chicken feet, donkey meat, roe meat, beef, mutton, dog meat, goose eggs, duck eggs, etc., this kind of food is active and floating, and the food is easy to move the wind and rise to the sun, triggering liver yang headache, liver wind and dizziness and other chronic diseases, in addition, it is also easy to induce or aggravate ** sores and ulcers. Although eggs are not a hair product, they should not be eaten more, generally not more than 2 a day, especially for patients with hepatitis, allergies, hyperlipidemia, high fever, kidney disease, and diarrhea. The reason is that eggs contain a lot of protein, but they belong to the opposite sex protein, and a considerable number of people have a pathological reaction after eating the opposite sex protein.

In addition, there are also vegetable oil, lees, liquor, liquor, peas, soybeans, tofu, tofu, silkworm pupae and onions, garlic, leeks and so on. Sometimes, foods such as meat and meat are also considered to be hair.

According to the performance of the hair, it is divided into six categories:

One is heat-generating things, such as shallot, ginger, pepper, pepper, mutton, dog meat, etc.;

the second is windy things, such as shrimp, crabs, geese, eggs, Tsubaki sprouts, etc.;

the third is damp and hot things, such as starch sugar, glutinous rice, pork, etc.;

Fourth, cold accumulation, such as watermelon, pear, persimmon and other raw and cold products;

fifth, it is to activate blood things, such as sea pepper, pepper, etc.;

Sixth, things that stagnate qi, such as mutton, lotus seeds, seeds, etc.