Harker Herbals Celtic Sea Salt with Kelp is a nutrient-rich sea salt with naturally occurring minerals and trace elements to support healthy adrenal, immune and thyroid function. NZ deep water kelp provides a rich source of natural iodine without affecting the fresh, clean taste of pure sea salt. Sun-dried, hand harvested and naturally rich in iodine. Includes minerals and trace elements of iron, selenium, potassium, calcium and magnesium essential for healthy adrenal, immune and throid function. No chemicals, additives or preservatives. Iodine - 98.17 mcg/gram of salt based on NZ kelp analysis of iodine = 2062.5mg/kg kelp.