What Is Kratom & Where Does It Come From?

Botanical Profile

Kratom (Mitragyna speciosa Korth.) is a tropical evergreen tree belonging to the Rubiaceae family — the same plant family as coffee (Coffea) and gardenia. The species is native to the tropical and subtropical forests of Southeast Asia, with natural range spanning Indonesia, Thailand, Malaysia, Myanmar, and Papua New Guinea.

In its native habitat, the kratom tree can grow to heights of 25 meters (approximately 80 feet) or more, with trunk diameters exceeding 90 centimeters. The leaves are the commercially valuable part of the plant — they are glossy, dark green, and can reach up to 20 centimeters in length and 12 centimeters in width. The tree produces yellow, globular flower clusters.

Kratom thrives in tropical environments with average temperatures between 24–30°C (75–86°F), high humidity, and rich, well-draining, slightly acidic soil with high humus content. These growing requirements are why commercial cultivation is concentrated in equatorial Southeast Asian regions rather than temperate climates.

Traditional Use

The use of kratom leaves in Southeast Asia predates modern commerce by centuries. Historical accounts document workers, particularly in Thailand and Malaysia, chewing fresh kratom leaves or brewing them into tea. This traditional use was integrated into agricultural work culture in these regions.

In Thailand, kratom was widely used among laborers until it was banned in 1943 under the Kratom Act. Thailand decriminalized kratom in 2021 and subsequently moved toward a regulated market. In Malaysia, kratom use remains common in rural northern regions, particularly in the states of Kelantan and Kedah, though it is technically a controlled substance under Malaysian law.

The Modern Supply Chain

Indonesia has emerged as the dominant global supplier of commercial kratom. The Indonesian kratom industry is centered on the island of Borneo (the Indonesian portion is called Kalimantan), with additional production in Sumatra and other islands. Kratom is not a controlled substance in Indonesia, though the government has periodically discussed regulation.

The supply chain typically flows from small-scale farmers and harvesters in Indonesian provinces, through consolidators and processors who dry, grind, and package the product, to exporters who ship bulk kratom to international distributors and retail vendors, primarily in the United States and Europe.

The U.S. is the largest consumer market for commercially sold kratom. Industry estimates suggest the American kratom market is valued in the billions of dollars annually, though precise figures are difficult to verify due to the lack of federal regulation.

Alkaloid Overview

Kratom leaves contain over 40 identified alkaloids — naturally occurring chemical compounds produced by the plant. The two most studied and commercially relevant alkaloids are mitragynine and 7-hydroxymitragynine (7-OH).

Mitragynine is the most abundant alkaloid, typically comprising 1–2% of dried leaf material by weight. It is the primary subject of pharmacological research into kratom. 7-Hydroxymitragynine is present in much smaller quantities in natural leaf (typically 0.01–0.04%) but has received significant regulatory attention due to its higher potency at the receptor level and the proliferation of concentrated 7-OH products in the commercial market.

Other notable alkaloids identified in kratom include speciogynine, paynantheine, speciociliatine, and mitraphylline, among others. The full pharmacological significance of many of these minor alkaloids remains an active area of research.