It's all soybean oil, why are some colors light and some colors thick? The difference is very big, don't buy it wrong
Soybean oil has high nutritional value, rich in unsaturated fatty acids, has the effect of repellent insects and moisturizing intestines, and many people love to eat soybean oil. When buying soybean oil, we found that there is no, some soybean oil is very light in color, some are very strong, why is this? Is it better to have a light color or a strong color?
Yesterday the neighbors were ready to buy cooking oil, also asked me this question, I guess many people have questions about it, today I will talk to you, do not understand friends come to learn about it.
The color of the cooking oil
The "thickness" of the color is related to the refining degree of edible oil, and according to the degree of refining, edible oil is divided into four grades: first, second, third and fourth.
The light color has a high degree of refining, generally a first- and second-grade edible oil, and the most common on the market is the first-class oil.
The degree of refining with thick colors is low, usually three or four grade edible oils, but the most common is the three grade oils.
So the question is, what is the difference between primary oil and tertiary oil? Which oil is better? This is an issue that everyone is concerned about, and I will talk to you specifically about it below.
Primary oil
The first-class oil has undergone a number of processes such as "degumming, deacidification, decolorization, deodorization", etc., with the highest degree of refining, filtering out all the impurities that are harmful to the body or affecting the taste, so the color is light yellow, transparent and clear, the taste is particularly fragrant, the smoke point is relatively high, used to stir-fry vegetables, frying when the oil smoke is less, it is not easy to produce harmful substances at high temperatures.
From a nutritional point of view, multi-channel filtration has filtered out the useful nutrients, the most important nutrition is fat, so the first-level oil has no nutrition? No, these fats, including saturated and unsaturated fatty acids, are essential to the human body.
Tertiary oil
The process of tertiary oil is less than that of primary oil, the degree of refining is low, and some useful nutrients for the human body are retained, is it better than primary oil? Wrong, it also retains a lot of impurities, so the color is relatively thick, these impurities lead to a low smoke point of edible oil, at high temperatures will produce a lot of oil smoke, as well as some harmful substances.
Is that tertiary oil highly nutritious? In fact, it is no different from primary oil. Because the fat content in edible oil accounts for more than 99%, other nutrients are minimal.
And these nutrients (mainly vitamins) are abundant in vegetables and fruits, and it is impractical to supplement vitamins by eating cooking oil. And the first-class oil impurities are small, the smoke point is high, and it is not easy to produce harmful substances, these advantages are the first things to consider when selecting oil, rather than paying attention to the pitiful vitamins.
So on the whole, the first-grade oil is better than the third-grade oil, that is, the light oil is better than the darker oil, don't buy the wrong one in the future.
What else do you need to pay attention to when buying cooking oil?
1, do not always buy the same kind of oil
Different oils contain different nutrients, such as soybean oil is very high in linoleic acid, while olive oil is high in oleic acid, these nutrients are needed by the human body, often change to eat to ensure balanced intake, is conducive to health.
2. Do not buy cooking oil in the near future
The shelf life of vegetable oil is usually only one year, the time is easy to be oxidized, the same barrel of 5L oil, some people eat two or three months, some people eat for half a year, once oxidized will produce "Hara taste", resulting in edible oil acid defeat, so play special price of temporary edible oil do not buy, often eat is not good for the body.
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