The title mentions high doses and long periods, but let’s quantify it more accurately:
Cases of toxicity have been reported at doses as low as 21 mg per day, the recommended daily intake is 1.3 to 2 mg. The person in question was diagnosed with issues possibly caused by this after 2 years.
Edit: Clarification, the 21 mg figure isn’t from this article but from a related document released by Australian Therapeutic Goods Administration.
Cases of toxicity have been reported at doses as low as 21 mg per day, the recommended daily intake is 1.3 to 2 mg. The person in question was diagnosed with issues possibly caused by this after 2 years.
Edit: Clarification, the 21 mg figure isn’t from this article but from a related document released by Australian Therapeutic Goods Administration.
https://consultations.tga.gov.au/medicines-regulation-divisi...
Another news source: https://www.theguardian.com/australia-news/2025/jan/05/simon...