Composition difference: refined salt NACL98.8% water contains neither minerals nor trace elements//Bamboo salt NACL93% water contains dozens of trace elements.
Differences in chemical properties: refined salt pH = 6.8-7 (weakly acidic)//bamboo salt pH = 1 1- 12 (alkaline).
Taste difference: refined salt is bitter, salty and thirsty; Bamboo salt is sweet, salty and thirst-quenching.
Second, the essential difference:
Refined salt belongs to chemical salt, and bamboo salt belongs to nutrient salt = natural healthy food. The real use of bamboo salt in ancient times: the ancients used salt and wicker to brush their teeth, and there is a saying that "wicker dipped in salt will live to 98". The ancient salt has either a fishy smell (sea salt) or a halogen smell (well salt), so it is very "disgusting" to use it directly to brush your teeth. So people who have the conditions will use fragrant bamboo salt.
At present, 90% of the salt basically comes from coastal areas. It should be refined with iodine. It means that it is made by complex engineering such as sun exposure, refining and filtration. Perhaps the reason for not adding iodine is for those with big neck disease. It seems that ... iodized salt is to add a proper amount of iodine on the basis of the above and give it to normal people, and the iodine nutrition is balanced.