Soft Salt Rumor

Soft Salt Rumor


Table salt changes colour to blue when mixed with rice water and lemon, unlike coarse salt which does not change colour when added to the same ingredients.

The Answer:

In response to the video spreading through WhatsApp (about salt that changes to blue when mixed with rice water and lemon, as opposed to coarse salt that does not change colour), we would like to clarify the following important points:

  • All types of consumption salt come from natural sources. The most common source of table salt, or Sodium Chloride, is sea water. It is produced by natural evaporation of seawater exposed to sunlight.
  • Governments require packaged salt manufacturers to add iodine to salt to prevent iodine deficiency. The World Health Organization (WHO) lists iodine deficiency as the most common cause of thyroid-related health problems, which can be completely prevented by consuming iodized salt.
  • UAE and Gulf Standard UAE.S GSO (1843) of 2007 for table salt requires the addition of iodine to table salt in areas suffering from a lack of iodine sources in their food, in order to prevent Iodine Deficiency Disorders (IDD.)
  • Coarse salt is made using the same process of table salt, but most of the times, no iodine is added.
  • The iodine in salt interacts with the starch in rice water. It turns blue in case lemon is added. This does not pose any health harm. Processed salt, which does not contain iodine, does not change colour.


  • If you rely on sources such as dairy products and seafood, to boost your iodine levels, you may not need to use iodized salt.
  • You can choose not to use iodized salt by reading the product’s information label, and choosing non-iodized salt.
  • To learn more about sources of Iodine, please check the Food and Agriculture Organization of the United Nations (FAO)’s website.

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