The film's biggest warning wasn't about the leaf — it was about what happens to an unregulated market. Adulterated products, concentrated 7-OH extracts sold as "kratom," and vendors who test nothing are the real hazard. A few rules protect you anywhere:
Demand lab results. Reputable suppliers publish independent, batch-level lab tests (identity, alkaloid content, heavy metals, microbes). No certificate of analysis, no purchase.
Stick to plain leaf. Avoid enhanced extracts and anything marketing 7-OH content — that's the category regulators are moving against, not the natural botanical.
Look for GMP practices. In the U.S., the AKA's GMP qualified-vendor program is the benchmark. Elsewhere, apply the same standard yourself. In Canada, for example, people looking to buy kratom in Montreal or anywhere nationwide should hold suppliers to that bar — Verified Botanicals is one that publishes lab verification for its leaf.