A rare Himalayan honey with centuries of tradition, unique bioactive properties, and a story that begins at the edge of the world's highest cliffs..
Mad honey is produced by the world's largest honeybee, Apis laboriosa, which forages on wild rhododendron flowers at altitudes between 2,500 and 4,500 metres across Nepal, Turkey, and parts of the Caucasus.
Rhododendron nectar contains naturally occurring grayanotoxins. When bees process this into honey, trace concentrations remain — giving it a distinctive reddish hue and properties that have made it legendary for millennia.
Over 30 rhododendron species grow in Nepal's mid-hills. Only certain species at specific altitudes produce nectar with meaningful grayanotoxin concentrations.
Spring blooms (March–May) and some autumn species create distinct harvest windows. Timing varies by altitude, species, and region.
Modern research is beginning to characterise what traditional knowledge has long suggested: mad honey contains a distinct phytochemical profile that sets it apart from any commercial honey.
Neurotoxic diterpenoids found in rhododendron nectar. GTX-III is the primary compound in Himalayan mad honey, acting on sodium ion channels. EFSA (2023) found insufficient data to establish a tolerable daily intake.
Grayanotoxin levels vary significantly by harvest altitude, rhododendron species, season, and processing method. Concentration cannot be estimated without laboratory testing.
Classified as a novel food in the EU (EFSA 2023), requiring pre-market authorisation. Legal in all 50 US states with no federal grayanotoxin limit currently in force.
Mad honey is not just a product. For the communities who harvest it, it is woven into economic life and local identity — a body of knowledge specific to their landscape that cannot simply be transferred to a global market.
Gurung and Rai communities in Nepal's Annapurna and Lamjung districts have long scaled sheer cliff faces using hand-woven rope ladders — a practice requiring deep, place-specific ecological knowledge.
In harvesting communities, mad honey has served as a seasonal tonic and traded good. Safe-use knowledge reflects familiarity with specific local conditions and is not reliably generalisable to commercial contexts.
Climate change is shifting rhododendron bloom patterns while growing commercial demand risks outpacing sustainable harvest cycles — requiring careful governance over access.
As global interest in mad honey grows, so does the need for an independent body that can separate fact from folklore, protect consumers, and safeguard the communities who steward this tradition.
IMHSI was founded to build the world's first structured certification framework for mad honey — combining scientific verification, ethical compliance, and full traceability from cliff face to consumer.
Peer-reviewed research and third-party lab testing at every stage.
Fair compensation and community governance for harvesting communities.
From harvest location and altitude to final product, every step documented.
Standardised testing protocols for grayanotoxin concentration and purity.
Whether you are a researcher, industry professional, or simply curious, IMHSI is building the definitive knowledge base for mad honey science and standards.
This page is updated regularly with IMHSI announcements — new research partnerships, standard development milestones, community engagement initiatives, and upcoming events. Check back often or subscribe to our mailing list to receive updates directly.
March 2026 — IMHSI Launches Three New Research Projects
IMHSI has formally initiated three active research programmes: the Rat Toxicity Study assessing safety thresholds for grayanotoxin consumption, Field Sample Collection & Categorization across key harvesting regions, and the Standardization of Cliff Honey Parameters project. Learn more on the Projects page →
February 2026 — IMHSI Website Goes Live
IMHSI’s new website launches, providing a central hub for our work on mad honey standards, safety research, and community engagement. Explore our pages on Science & Safety Standards, Culture & Heritage, and Get Involved.
More updates coming soon.
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