Researcher using a microscope and reference book during plant identification

Kratom Glossary: Botany, Extracts, Testing, Labels, and Research Terms

July 16, 2026 at 12:35 pm

Reviewed: July 15, 2026. Kratom vocabulary often mixes plant science, chemistry, laboratory testing, product labels, and human research. The definitions below keep those meanings separate.

Kratom is a tree whose leaves are consumed fresh in parts of Southeast Asia and sold internationally in forms such as dried powder, capsules, tea, tablets, gummies, liquids, and extracts. People report effects including stimulation, alertness, energy, relaxation, pain relief, nausea, dizziness, dependence, and withdrawal. A technical word on a package or study should be read in that real human context, with its exact unit and evidence.

Botanical identity

Mitragyna speciosa. The accepted botanical name for the species commonly called kratom. Royal Botanic Gardens, Kew places it in the coffee family, Rubiaceae, and records a native range from southern Indochina to New Guinea.

Botanical name. A scientific name formed from a genus and species. It identifies a biological taxon; it is not a catalog flavor, color family, or quality grade.

Genus. The classification rank above species. Mitragyna contains several accepted species. Sharing a genus does not make two species interchangeable.

Common name. A non-scientific name used in everyday language. Kratom, krathom, ketum, and biak-biak occur in different linguistic and regional records.

Voucher specimen. Preserved plant material deposited in a recognized collection and available for later examination. A voucher can anchor a research sample to a botanical identification.

Native range. The places where botanical authorities record a species as occurring naturally. Native range differs from present cultivation, product origin, and geography-style retail names. The botanical guide to the kratom tree covers the physical evidence behind the name.

Plant source and cultivation

Wild-harvested. Collected from a naturally reproducing population rather than intentionally established as a crop. A meaningful claim identifies the collection area, authorization, population condition, harvest plan, collectors, and chain of custody.

Cultivated. Deliberately established or managed for production. The term can include home-garden trees, retained farm trees, mixed agroforestry, orchards, planted stands, and nursery-raised material.

Agroforestry. A land-management system that deliberately integrates woody perennials with crops or animals. It describes the production system, not the chemistry or quality of the harvested leaf.

Cutting. A piece of living stem used to produce a genetically matching plant when propagation succeeds.

Seedling. A young plant grown from seed. Sexual reproduction recombines genetic material, so seedlings from one parent tree are not clones. See How Kratom Trees Reproduce for the flower-to-seed cycle.

Leaf and powder terms

Fresh leaf. Leaf material used before commercial drying. Southern Thai and northern Malaysian records describe people chewing fresh leaves or drinking water-based preparations. Fresh-leaf studies should not be silently presented as studies of concentrated extracts.

Dried leaf. Leaf material after moisture reduction and before or after further cutting. Drying conditions affect storage stability and can influence the finished material.

Kratom powder. Dried Mitragyna speciosa leaf that has been milled. Particle size, moisture, blending, and sanitation are processing variables; the word powder alone gives no alkaloid result.

Plain leaf. Leaf material without a declared added extract. Plain leaf can still vary by lot and requires identity and contaminant controls.

Enhanced powder. A commercial term generally used when leaf powder is combined with an extract or alkaloid-rich fraction. The ingredient list and measured alkaloid amount should show what “enhanced” means for the actual package.

Tea. A water-based preparation made from leaf or powder. The amount transferred into the liquid depends on the material and preparation; the word tea does not supply a measured concentration. The physical commercial sequence is described in From Leaf to Powder.

Extract and product-format terms

Extract. Material produced by using a solvent or other process to separate and concentrate selected constituents from the starting botanical. Extract powder, liquid extract, tablets, gummies, and shots can have different ingredients and concentrations.

Extraction ratio. A stated relationship between starting botanical mass and resulting extract mass, often written in a form such as 10:1. It describes a manufacturing relationship only when its basis is defined. It does not equal a mitragynine percentage or a guaranteed multiple of human effects.

Standardized extract. An extract adjusted or manufactured to meet a defined amount or range for a named constituent. The constituent, unit, analytical method, and basis should be stated.

Full-spectrum. A commercial phrase suggesting that multiple constituents remain present. It has no useful numerical meaning without an ingredient identity and analytical profile.

Isolate. Material represented as a separated compound at high purity. A purity percentage, analytical method, and impurity profile are needed to interpret the claim.

Format. The physical form delivered to the buyer: powder, capsule, tea, tablet, gummy, liquid, shot, or extract powder. Format affects convenience, ingredients, packaging, and how concentration is labeled. Compare them in the kratom product-types guide.

Alkaloids and chemistry

Alkaloid. A broad class of nitrogen-containing compounds produced by many plants. Kratom leaves contain multiple alkaloids.

Mitragynine (MIT). A major kratom alkaloid and common analytical marker for leaf and extract products. “MIT” on a label should be paired with a unit, such as percent by weight or milligrams per tablet.

7-hydroxymitragynine (7-OH or 7-HMG). A kratom-related alkaloid present at low levels in leaf and also encountered in concentrated or separately manufactured commercial products. A label should distinguish a measured trace result from an intentionally concentrated ingredient.

Minor alkaloid. An alkaloid present at lower abundance than the principal measured constituent. “Minor” refers to amount, not necessarily biological importance.

Analyte. The specific substance a laboratory method is intended to measure, such as mitragynine, lead, arsenic, or a microbial target.

Chromatogram. The instrument output showing separated signals over a run. Interpretation depends on standards, calibration, sample preparation, method suitability, and peak identification.

Reference standard. Material with a sufficiently established identity and value used to calibrate or check a measurement. The kratom alkaloid guide connects the names to plant and product evidence.

Units and concentration

Milligram (mg). One-thousandth of a gram. A tablet label may report milligrams of a named alkaloid per tablet, while a package may report total net weight in grams. Those numbers answer different questions.

Percent by weight (% w/w). The mass of a named constituent divided by total sample mass, multiplied by 100. One percent by weight equals 10 milligrams per gram when the stated basis is the same.

Dry-weight basis. A concentration calculated after accounting for water. It should not be compared directly with an as-is or wet-basis number unless moisture is addressed.

Parts per million (ppm). A ratio often used for trace contaminants. For solid materials on a mass basis, 1 ppm commonly corresponds to 1 milligram per kilogram.

Colony-forming units per gram (CFU/g). A microbiology reporting unit estimating viable organisms capable of producing colonies under the test conditions.

Laboratory-result terms

Assay. A defined analytical procedure used to measure an analyte or property. The method, sample preparation, calibration, and reporting basis affect the result.

Limit of detection (LOD). The lowest concentration that a method can reliably distinguish from a blank under defined conditions. Detection is not the same as precise quantitation.

Limit of quantitation (LOQ). The lower level at which a method can report a numerical amount with defined performance. Laboratories may use method-specific terminology and validation rules.

ND or not detected. The method did not detect the analyte above its stated decision point. ND does not mean absolute zero; the LOD or reporting limit provides the needed context.

Specification. A predefined requirement for identity, composition, strength, purity, or contaminant limits. The specification should exist before the result is judged.

Pass/fail. A conclusion comparing a result with a named specification. A number without its limit cannot show why it passed, and “pass” without the test and method is incomplete.

Uncertainty. A quantitative expression of the range reasonably associated with a measurement. It is different from a mistake and helps show the precision supported by the method.

Identity and contaminant testing

Botanical identity testing. Examination used to determine whether material matches the claimed plant. Depending on the material, evidence may include morphology, microscopy, chemistry, or DNA methods. No single method answers every identity question after processing.

Heavy metals. A product-testing category that commonly includes lead, arsenic, cadmium, and mercury. Results must name the element, unit, method, and applicable limit.

Microbial testing. Tests for defined microorganisms or counts, such as Salmonella, pathogenic E. coli, total aerobic count, yeast, or mold. An organism-specific absence test and a general count are not interchangeable.

Adulterant. An undeclared, substituted, or otherwise inappropriate substance that changes the identity or composition of the material. Follow the testing sequence in How Kratom Botanical Identity Is Tested and Heavy Metals and Microbes in Kratom.

Lots, samples, and traceability

Batch. A specific quantity produced under defined conditions and intended to be uniform within established limits.

Lot. A quantity identified for control and traceability. Companies sometimes use batch and lot differently, so the internal record should define the relationship.

Batch, lot, or control number. A unique code that connects product to manufacturing and distribution history. A code printed on a pouch becomes useful when the company can retrieve the corresponding records.

Laboratory sample ID. The identifier assigned by the laboratory to the submitted material. It may differ from the manufacturer’s lot code; the report should show how the two connect.

Representative sample. A sample collected under a plan intended to reflect the lot being evaluated. A perfectly accurate instrument cannot fix a sample that represents only one unrepresentative corner of a large blend.

Chain of custody. The record of who collected, possessed, transferred, stored, and submitted a sample or lot.

Reserve or retain sample. Material held from a lot for later examination under defined storage and retention conditions. See Batch Numbers, Lot Codes & Lab Sample IDs.

Certificates of analysis

Certificate of analysis (COA). A laboratory or quality document reporting results for identified material. A useful COA names the sample, methods, dates, analytes, units, results, and laboratory, and can be connected to the product lot.

Scope. The exact material and tests covered by a document. A COA for bulk extract powder can support tablets made from that powder only when manufacturing records document the ingredient lot and any later formulation or processing; it does not automatically report tablet weight, added ingredients, or every finished-product contaminant result.

Accreditation. Formal recognition that a laboratory meets specified competence requirements within a defined scope. Accreditation does not make every method or analyte part of that scope. The kratom COA guide provides a field-by-field reading method.

Product-label terms

Net weight. The amount of product in the package, excluding the container. It is not the same as the amount of mitragynine.

Unit count. The number of capsules, tablets, gummies, or other individual pieces in a package.

Ingredient statement. The list identifying what the product contains. Flavors, sweeteners, binders, acids, colors, and other components matter when comparing formats.

Serving size. The labeled amount associated with a product’s serving information. It should not be confused with package net weight or treated as individualized medical advice.

Catalog family or “strain.” A retail naming system commonly built around color, region, or trade terms. It does not establish a botanical subspecies or guaranteed effect. Use the kratom product-label guide for package fields.

Human-research and effects terms

In vitro. Work performed outside a living organism, such as a receptor or cell assay. It can identify activity in that system but does not reproduce the full experience of a person consuming kratom.

Animal study. Research in a nonhuman species. It can investigate mechanisms and toxicity signals under controlled conditions; species, route, and exposure must remain attached to the result.

Controlled human study. Research in which investigators assign or tightly control defined materials and procedures. Small human kratom studies have measured pharmacokinetics and acute effects after characterized material.

Observational study. Research that measures people and outcomes without the investigator assigning the exposure. Kratom surveys and community cohorts can document patterns, motivations, reported effects, dependence, and withdrawal, while confounding and self-report remain part of interpretation.

Pharmacokinetics. Measurement of how concentrations change over time after administration, including absorption, distribution, metabolism, and elimination.

Adverse event. An unwanted health occurrence reported after exposure. A report does not by itself prove causation, but timing, product identity, co-exposures, clinical details, and repeated patterns can strengthen an assessment.

Dependence. Adaptation in which stopping or reducing repeated use can produce withdrawal symptoms. It is related to, but not identical with, a substance-use disorder.

Withdrawal. Symptoms that can occur after stopping or reducing repeated use. Kratom studies have documented withdrawal in some regular consumers.

Interaction. A change associated with using kratom alongside another drug, substance, or health condition. Product identity, timing, amounts, and individual factors matter. Current evidence is summarized in What Kratom Research Knows.

Sources and further reading

For direct access to literature databases, trial records, books, agency documents, and organization disclosures, use the reviewed kratom research-source guide.

This glossary is educational and is not medical, legal, or laboratory-accreditation advice.

Image credit: “Plant Identification” by Samantha Laarman / Joshua Tree National Park, public domain; cropped from the original.

Written By : Kratom Paradise Editorial Team