The apple watch series four has a really amazing tool that allows users to do an electrocardiogram and check how your heart is doing.
Ive recently found this whitepaper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4275233/
Which details the possibility of kratom being cardiotoxic.
If this is true we should see some abnormal results from an ECG from longterm users that either confirm or deny these findings.
How to use Apple Watch S4 EKG:
Please make a post detailing how long you have been using kratom, an estimation of how much you take daily, and what your EKG says.