The PWTI value (provisional tolerable weekly intake) is currently 300 µg/week (1 µg = 1.000 ng) and includes all possible sources through which mercury can be absorbed. In the nasal sprays or throat sprays, the Carragelose® content is around 1.3 mg/day if used 4 times daily and thus the maximum mercury content is 1.3 ng/day. This means that the maximum possible amount of mercury in the Carragelose® lozenges is 10 ng per lozenge. The maximum allowed amount is 1 ng of mercury per mg of Carragelose®.
Carragelose® is tested for mercury before it is processed in the finished products.
