All herbs are naturally sourced and all batches are third party tested to be free of heavy metals, pesticides, and microbial contamination. Our facility operates under Canadian NNHPD Site License 300131 and is USFDA inspected. Heartdrops are authorized for sale by Health Canada. If you have a specific question that is not listed here, please contact our super friendly Customer Service Team. Call us toll free 1 866 478 2873 from Monday to Friday, 830am – 5pm PST