New research points to usefulness of kratom for those with opioid related issues:

https://www.sciencedirect.com/science/article/pii/S0378874119304994

Conclusions

Our findings indicate that kratom initiation (approximately 214.29 mg of mitragynine) was associated with significant decreases in the prevalence and severity of opioid adverse effects.

submitted by /u/Rosebud123456789
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https://www.reddit.com/r/kratom/comments/bhz4gd/selfreported_prevalence_and_severity_of_opioid/