Oregon Residents!
Due to a new law concerning the heavy metal allowance in mitragyna products, we regret to inform you that we are not allowed to sell plain leaf or products containing plain leaf. We are currently seeking mitragyna products that comply with these regulations, but it is not a simple or rapid process. Please consider our signature extracts as an alternative, as they do not contain heavy metals in quantities exceeding the limits mandated by this new law.
Popular selections
Researcher Favorites
ISOL-8 Full Spec Pwd Mitragyna Extract ~ 8% Mitragynine (5 gm)
Enriched Cerah Malay (E-KM) (25 gm)
Herb Research Foundation
A Legacy of Botanical Research
HRF has studied mitragyna since 1997 and worked closely with Robert Montgomery of Botanical Preservation Corp and Of The Jungle, who helped introduce mitragyna to the United States market in 1995. That history informs our emphasis on careful sourcing, evaluation and responsible distribution.
We work with suppliers who share our standards.
Available lots are evaluated for identity, purity and consistency.
Orders follow applicable laws and shipping restrictions.
Optional order upgrades
Expedited Shipping Options
Add an eligible expedited service to your order when faster delivery is required.
USPSPriority Mai Express 1-2 day (Only available for single kilo orders or less)
Only available for single kilo orders or less.
Informational resources
Learn Before You Buy
Understanding Botanical Extracts
A practical introduction to extracts, standardization and product formats.
Explore the libraryOur Testing & Quality Process
Read how identity, purity and consistency inform our review process.
Review our standardsShipping Restrictions & Policies
Check destination restrictions, delivery information and return requirements.
Read shipping policiesQuick help
Frequently Asked Questions
Where can I review shipping restrictions?
Review Shipping & Returns and Conditions of Use before ordering. Availability depends on the destination and current law.
How are botanical materials evaluated?
Our published process emphasizes careful sourcing, laboratory screening and responsible distribution.
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