Look for natural salt without treatment of yellow prussiate of soda or without anti-caking agent. Check ingredients on the product label and check the manufacturer website for the use of anti-caking agent.
Avoid to use table salt as it is treated with yellow prussiate of soda and contains anti-caking agent.
e.g. Morton TFC Sea Salt is prepared by treating Sea Salt with a minute concentration of yellow prussiate of soda, an additive permitted for food use, as a water-soluble anti-caking agent.
Nutrition and Health Facts: