Iodine is an essential trace element for human body. Eating too much or too little is harmful. The recommended amount of iodine in China is 150ug/ day for adults and 90- 120ug/ day for children aged 3- 14. But there are some differences for special groups. For most people, not eating iodized salt may lead to insufficient iodine intake, which will affect their health.
2. Low sodium salt: suitable for people with hypertension.
The content of sodium chloride in common iodized salt is as high as 95%. Sodium ion can enhance the surface tension of human blood vessels, which is easy to cause blood flow to accelerate and blood pressure to rise. According to national standards, the content of sodium chloride in low sodium salt is 60%-80%, and the content of potassium chloride is 10%-35%. Compared with salt, the content of sodium is lower and the content of potassium is higher.
3. Add calcium salt: the calcium content is too small.
The demand for calcium in human body is relatively large, and the recommended standard in the United States is 1000 mg per day for adults. According to the calcium content in calcium salt (0.25 ~ 0.55%), people only get dozens of milligrams of calcium from calcium salt. This is basically negligible to meet the calcium needs of the human body.
4, adding selenium salt: suitable for low selenium areas.
Selenium is a constituent element of selenoprotein, which can protect cells from free radical attacks and is of great significance to heart health and immune enhancement. However, if each gram of selenium salt contains 15 micrograms of sodium selenite, which is equivalent to 6.8 micrograms of selenium, according to the calculation that China people eat 6- 10 grams of salt every day, selenium salt can provide 40-70 micrograms of selenium. For people in low selenium areas, or people who lack selenium, it has certain benefits.