Natural sea salt, known as "the essence of the sea", which contains a balanced variety of essential minerals was first taken by our ancestors. However, modern civilization has dumped a large amount of industrial wastewater and domestic sewage into the sea therefore "the essence of the sea" has subsequently become dirty and polluted. Due to the circumstance, salt, that is indicative to people, has given us a "worried and hazardous feeling" while consuming it. This is because people know once the heavy metals, like lead, mercury, chromium and cadmium are taken together with salt into a human body, and these heavy metals will be difficult to discharge and become a kind of sediments and form toxins in the body. As a result, the natural sea salt must be processed before being consumed. Thereupon, the table salt is introduced. It has ensured the hygiene profile; however, those essential minerals for human body have also been eliminated during the process. Consequently, the process destroys the nutritional balance found in salt. In other words, table salt may seem clean, but the heavy-metal contamination in the salt, thought as the number one killer in the era of pollution, is still eliminated owing to the insufficiency in the technological process. This has even also highlighted the heavy-metal components due to the filtration of the essential minerals. Strictly speaking, it is more appropriate to consume less table salt in our diet. In order to enhance the standard of salt, there are many industries produce the "table salt fortified with calcium," "table salt fortified with potassium", "table salt fortified with zinc" and "table salt fortified with selenium"; the so called "seasoning salt". Since the addition of some trace elements and minerals, this salt has been referred as "nutritious salt" or "multi-variety of salt". Here, there are two points needed our attention.
First, this kind of salt is not necessarily the true "nutritious salt" although it is only slightly better than the unfortified table salt. Specifically, salt itself must contain more than 60 types of minerals and trace elements. But the "nutritious salt", not only its nutritional content is obviously insufficient, but also shows its deficiency in its types.
Second, the major process of the table salt adopts the method of evaporation. However, in this process, it is difficult to eliminate some part of the contamination, especially heavy metals. From the view of national standard of salt, the standard content of lead limits is not more than 1 mg / kg. (In fact, this aspect has clearly clarified that the table salt that we take still remains a trace amount of heavy metals.) Once these heavy metals enter human body, due to the difficulty in discharging them and they will eventually form toxins in the body . Therefore, it is not a real nutritious salt. In addition, the table salt contains a great deal of impurity, such as the anticaking agents. In the conclusion, the salt with shiny crystal appearance may not exactly be the "clean" salt.
In the late 1980s, Korea first introduced the bamboo salt to the world. In brevity, bamboo salt is made of natural sea salt which is stuffed into bamboo tubes then burned by pinewood fire for several times. In the process, natural sea salt, bamboo tubes, pine wood and pine resin are needed as raw materials. The use of these special mixed substances ensures the toxins in the salt will obtain maximum neutralization and elimination through roasting at high temperature. At the same time, the medicinal properties may also be retained and enhanced maximally. There are many bamboo salt benefits . It is excellent in prevention and treatment towards various modern diseases caused by polluted toxins.