Recently, Japan discharged nuclear-contaminated water into the sea
There has been a "salt hoarding tide" in many places on the mainland
Online and offline were snapped up
China National Salt Group responded urgently
"Sea salt only accounts for 10% of mainland salt products"
"Salt reserves are plentiful"
Appeal to everyone to buy rationally
Today, I will take you to understand
The main source of salt in the mainland
And how to pick the right salt
↓↓↓
Different kinds of salt
What's the difference
Mainland salt sources are mainly divided into three categories:
Well salt, lake salt, sea salt
At present, the proportion of salt product structure in the mainland is
Well salt 87%, sea salt 10%, lake salt 3%
Well salt and lake salt production
None of them are affected by Japanese nuclear pollution
Seawater is introduced into the salt pan and then sun, evaporated and crystallized;
Salt extracted directly from the salt lake, or dried in the salt pan using salt lake brine as raw material;
Extracted from salt deposits, rock salt buried 100 meters ~ 3000 meters underground;
The coarse salt is sealed in a bamboo tube with yellow mud and calcined at high temperature, which not only removes the miscellaneous smell in the salt, but also has a hint of bamboo fragrance;
From the quality point of view, well salt is higher than lake salt and sea salt, because the raw materials of well salt come from natural brine and rock salt deposits below kilometers deep, which will hardly be polluted and have few impurities.
Although there are many types of salt and different prices, according to the "nutrition content table", these three are mainly marked: sodium, iodine, potassium.
After the former Ministry of Health revised the "Standards for the Use of Food Nutritional Fortifiers" in 2012, salt is no longer allowed to add nutritional fortifiers other than iodine.
Low sodium salt, generally using iodized salt as raw material, and then adding a certain amount of potassium chloride, etc., thereby improving the balance of sodium and potassium in the body and preventing high blood pressure. Of course, iodine-free low-sodium salts are now also available.
Ding Xia, deputy chief physician of the Department of Nutrition of the Affiliated Hospital of Jiangsu Nantong University, introduced in a Health Times article in 2018 that people who are not suitable for high potassium intake, such as high-temperature workers, heavy physical labor-intensity workers, renal dysfunction patients and hypertensive patients taking antihypertensive drugs, should use low sodium salt with caution.
Jin Yuqian, a nutritionist at the Department of Nutrition of Run Run Shaw Hospital affiliated to Zhejiang University, explained in an article published on the hospital's public account in 2021 that because some antihypertensive drugs have potassium-preserving effects, low sodium salt relatively increases potassium content, and blood potassium in the body is easy to rise. Common antihypertensive drugs are spironolactone, triamterene, captopril, valsartan, etc. If you are not sure what medication you are taking, you can consult a specialist.
Iodine is an important synthetic element of thyroid hormone, lack of thyroid hormone will affect growth and development, especially for pregnant women, children are very critical, so do not blindly choose non-iodized salt. Moreover, iodine deficiency can cause "big neck" disease.
However, patients with hyperthyroidism need to consume non-iodized salt. At the same time, avoid foods with high iodine content in the diet.
In addition, those living in areas with water iodine content higher than 150ug/L can choose non-iodized salt. In areas that cannot reach this level, it is better to choose iodized salt, and iodine deficiency brings more harm than iodine excess.
The reason why iodine is added to salt is because the mainland was once a country with a serious epidemic of iodine deficiency disease, and since 1996, the mainland has begun to implement national salt iodization.
Regarding whether it is necessary to continue to consume iodized salt, there have been various views on the Internet, some people think that the mainland has supplemented iodine for so many years, there is no need to consume iodized salt, and the high incidence of thyroid cancer is related to iodine; Some people also said that coastal areas eat more seafood, and food can supplement iodine; There is also a view that iodine deficiency has serious consequences and should continue to supplement iodine.
The Shanghai Municipal Health Commission has said that there is no direct evidence that iodized salt consumption or increased iodine intake is associated with the occurrence of thyroid cancer.
Gu Chuanling, deputy secretary-general of the Capital Health Nutrition and Gastronomy Association, said in a Health Times article in 2017 that in addition to the suspension of iodized salt in high-iodine areas, other areas should continue to eat iodized salt, otherwise the risk of iodine deficiency is very high. For a small number of people in patients with hyperthyroidism, thyroiditis, autoimmune thyroid disease, etc., whether to take iodized salt should be followed by a doctor.
Salt will increase the osmotic pressure inside and outside the food, so by salting, the food can be dehydrated, or concentrated flavor, or marinated into the taste. The larger the particles, the slower the penetration into the food and the slower the water out of the food.
Therefore, when cooking steak, you can choose large particles of sea salt to avoid salt penetrating into the meat too quickly and causing gravy loss.
This high-value pink and tender sea salt has neither better flavor nor better nutritional value, and high appearance may be the only advantage. Salt like this is basically just a gimmick.
Salt needs to be sealed and stored, and the packaging should be checked for air leakage when purchasing, and the nutrition facts table and shelf life on the product label should also be paid attention to.
High-quality table salt is white in color and free of impurities, but over-white table salt may be artificially treated.
After choosing a reliable salt brand, you can smell it close to ensure that there is no pungent smell.
【Tips】Salt is essential for maintaining normal physiological functions of the human body, however, excessive intake of salt can also lead to health problems such as high blood pressure and gastritis. Therefore, we want to use salt rationally, control
Editor / Zhang Shan
Source/Popular Science Chinese People's Network Science Popularization Health Times Lilac Life Research Institute
1. Xintiandi and time-honored restaurants have discounts, and this street has many discounts for old meals
2. "Childlike heart" meets "original heart", this residential area has a new action to promote "zero distance" of commercial housing