The Food and Drug Administration issuing a mandatory recall of all kratom products.
They're often used for pain relief and help with opioid withdrawal.
The FDA says several kratom products have tested positive for salmonella.
Kratom is a plant native to Malaysia.
The leaves are traditionally crushed and made into tea.
In the United States, kratom is sold as a dietary supplement in the form of pills, powders, capsules and tea.
The FDA issued a statement about kratom last month, saying there's no evidence the product is safe of effective for any medical use.