Ingredient
Calcium Carbonate (limestone abrasive)
Flagged in 1
Scout's take
Mined limestone used as the primary mild abrasive that polishes enamel and lifts surface stains. Inert at the molecular level, but Lead Safe Mama 2025 testing strongly implicates the limestone feedstock as the likely route of the 457 ppb lead and 202 ppb mercury contamination — limestone is a natural mineral that varies dramatically in trace-metal content depending on the deposit it is mined from.
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