Celtic Sea Salt (Grey Salt)

Celtic Sea Salt (Grey Salt) is primarily sodium chloride (NaCl), comprising approximately 33% sodium and 50% chloride by weight, with a notably lower sodium content than refined table salt (~33g Na per 100g vs ~39g Na per 100g for refined salt) due to its higher moisture and trace mineral content. Moisture content is approximately 5–13%, giving it its characteristic grey, damp texture. Key mineral profile per 100g: Magnesium ~0.3–0.5g (as magnesium chloride and magnesium sulfate), Calcium ~0.2–0.3g (primarily as calcium sulfate), Potassium ~0.1–0.2g (as potassium chloride), Iron ~20–50mg (contributing to its grey coloration, sourced from clay-lined salt pans), Manganese ~1–5mg, Zinc ~0.5–2mg, Selenium ~trace (<0.05mg), Iodine ~variable and generally low (<0.5mg, significantly less than iodized table salt). Contains over 80 trace elements including sulfur (~0.3–0.5g), silicon, phosphorus, strontium, boron, copper, and chromium in micro- to trace amounts. No macronutrients such as protein, fat, carbohydrates, or fiber. No vitamins present. Bioactive compounds include naturally occurring clay-derived silicates and algal-derived organic matter from the Guérande or similar Atlantic coastal salt marshes, which contribute to its distinctive mineral complexity. Bioavailability notes: Minerals are present in ionic/dissolved salt forms (chlorides and sulfates), which are generally highly bioavailable and readily absorbed in the gastrointestinal tract. Magnesium from marine salt sources has moderate-to-high bioavailability (~30–40% absorption). The naturally balanced mineral matrix may enhance co-absorption of trace elements compared to isolated mineral supplements. Caloric value: 0 kcal. Typical serving size is 1–5g, so actual mineral intake per serving is modest; Celtic sea salt should be considered a supplementary source of trace minerals rather than a primary dietary source.