Kratom products are not safe to be sold over-the-counter for human consumption - 63 times more deadly than other natural products. See, e.g. Li, et al., An evaluation of adverse drug reactions and outcomes attributed to kratom in the US Food and Drug Administration Adverse Event Reporting System from January 2004 to September 2021 (Clinical Transl. Sci. 2023 June: 16(6):1002-1011. PMID 36861661.