Health regulators have announced a recall of St John's worts that were manufactured in 2013 due to toxic contamination. They recall 91,800 packets of the product sold for three years in the UK.
St John's wort is extracted from the hypericum perforatum plant and is used to treat depression, anxiety, loss of appetite and insomnia.
The packets are suspected to be contaminated with a toxin that can cause liver damage.The Medicines and Healthcare products Regulatory Agency (MHRA) has warned that the affected batches have levels of a toxic pyrrolizidine alkaloid above recommended levels.
The MHRA is urging people not to use the drug and return them back to the company. They speculate that the tablets were likely to have been mixed with poisonous weeds when the plants were harvested.