What Is Kratom? A Science-Based Guide to the Kratom Plant, Effects, Risks, and Legality

Kratom is a plant scientifically known as Mitragyna speciosa, a tropical tree in the Rubiaceae family, the same botanical family that includes coffee. Native to Southeast Asia, including Thailand and neighboring countries, kratom has a long history of traditional use involving its leaves. Today, kratom is sold in forms such as dried leaves, powder, tea, capsules, and extracts.

The kratom plant contains numerous naturally occurring alkaloids, with mitragynine and 7-hydroxymitragynine (7-OH) among the best-studied compounds. These substances can interact with opioid receptors, including mu-opioid receptors, which helps explain some of kratom's reported effects. However, kratom's pharmacology is more complicated than simply calling it an opioid, stimulant, or sedative. Research is still developing, and kratom has not been established as an FDA-approved treatment for any medical condition.

What Is Kratom Made From?

Kratom comes from the leaves of the Mitragyna speciosa tree. The leaves contain a complex mixture of naturally occurring chemicals rather than one single active ingredient.

The best-known compounds are:

• Mitragynine
• 7-hydroxymitragynine (7-OH)
• Other kratom alkaloids and plant constituents

These compounds contribute to the pharmacological activity of kratom. Researchers have identified many alkaloids in kratom leaves, although mitragynine is generally the predominant alkaloid in traditional botanical kratom.

This is important because the effects of a kratom product can depend on its chemical composition. A traditional dried-leaf preparation is not necessarily chemically equivalent to a concentrated extract or a product containing enhanced levels of a particular alkaloid.

Where Does Kratom Come From?

Kratom comes from a tropical tree native to Southeast Asia. It is particularly associated with countries such as:

• Thailand
• Indonesia
• Malaysia
• Myanmar
• Papua New Guinea

The plant grows in warm, humid environments and is sometimes described as a tropical evergreen tree. Its botanical name is Mitragyna speciosa.

Kratom has a long history in Southeast Asia. Traditionally, people have chewed fresh leaves or prepared leaves as tea. Historical accounts describe traditional Southeast Asian kratom use in connection with physical work, fatigue, and other cultural practices. NCCIH notes that kratom has traditionally been used to fight fatigue and improve work productivity, as well as in religious ceremonies and for symptoms such as pain and diarrhea.

Traditional use, however, should not be confused with proof of modern medical effectiveness or safety.

Kratom History and Traditional Use

The history of kratom is closely connected to communities in Southeast Asia where the plant has been used for generations.

Historically, fresh or dried kratom leaves could be chewed or prepared as a beverage. Some traditional users associated kratom with increased ability to work for extended periods, while other traditional applications involved relaxation or relief from physical discomfort.

Modern commercial kratom is different in several ways from traditional preparations. Products may be dried, powdered, encapsulated, extracted, or concentrated. This means that historical descriptions of leaf use should not automatically be applied to every modern kratom product.

What Are Kratom Alkaloids?

Kratom alkaloids are naturally occurring chemical compounds in the plant that help produce its pharmacological effects.

The two compounds most often discussed are mitragynine and 7-hydroxymitragynine.

What Is Mitragynine?

Mitragynine is the major alkaloid found in many traditional kratom leaf preparations. It has been studied for its interaction with several biological targets, including opioid receptors.

Its activity is one reason researchers are interested in understanding kratom pharmacology and how kratom affects the body.

What Is 7-Hydroxymitragynine?

7-hydroxymitragynine, commonly abbreviated as 7-OH, is another kratom alkaloid. It occurs naturally in kratom leaves in relatively small amounts but has substantially stronger activity at the mu-opioid receptor than mitragynine.

This distinction has become especially important because some modern commercial products contain concentrated or enhanced amounts of 7-OH rather than resembling ordinary botanical kratom leaf. The FDA has specifically warned about concentrated 7-OH products and distinguishes them from naturally occurring trace amounts in kratom leaf.

How Does Kratom Work?

Kratom's effects are related to its alkaloids and their interactions with several biological systems.

Mitragynine and 7-hydroxymitragynine can interact with opioid receptors, including mu-opioid receptors in the nervous system. These receptors are also involved in the effects of conventional opioids.

That does not mean kratom is chemically identical to prescription or illicit opioids. Kratom contains different compounds and has a more complex pharmacological profile.

How Kratom Affects the Body

Kratom pharmacology is still being investigated. Its effects may involve:

• Opioid receptor activity
• Central nervous system effects
• Changes in alertness and arousal
• Changes in pain perception
• Gastrointestinal effects
• Cardiovascular effects
• Metabolism involving liver enzymes and other pathways

The result can vary considerably from one person or product to another.

Dose, product composition, alkaloid concentration, frequency of use, individual physiology, and interactions with other substances can all influence the experience.

Is Kratom an Opioid?

The answer depends on what is meant by “opioid.”

Kratom itself is a botanical substance rather than a conventional opioid drug such as morphine or oxycodone. However, some of its alkaloids interact with opioid receptors, including mu-opioid receptors.

For that reason, describing kratom as having opioid-like pharmacological activity is more precise than simply saying that kratom is an opioid.

The DEA and NCCIH both recognize that kratom can produce effects that overlap with opioid and sedative effects, while also producing stimulant-like effects in some circumstances.

Is Kratom a Drug?

Kratom is a psychoactive botanical substance. Whether it is legally classified as a “drug” depends on the jurisdiction and the context in which the term is being used.

It is also important to distinguish a scientific description from a regulatory classification. A substance can have pharmacological activity without being placed in a particular controlled-substance schedule.

Is Kratom a Narcotic?

“Narcotic” is an imprecise term in everyday conversation and can have a specific legal meaning in some jurisdictions.

Kratom has opioid-receptor activity, but it should not automatically be treated as chemically equivalent to conventional narcotic medications or illicit opioids.

Is Kratom a Stimulant?

Kratom can produce stimulant-like effects, particularly effects such as increased alertness, energy, and sociability reported in some circumstances.

However, calling kratom simply a stimulant is incomplete because other users report relaxation, drowsiness, or sedative-like effects.

Is Kratom a Sedative?

Kratom is not simply a sedative either. Some people report relaxation and drowsiness, especially with products or amounts that produce stronger opioid-like effects.

The terminology is therefore context-dependent, and neither “stimulant” nor “sedative” fully describes kratom's pharmacology.

What Does Kratom Do?

The answer to “what does kratom do?” is complicated because reported effects vary.

NCCIH reports that people who use kratom have described both stimulant-like effects and effects resembling those associated with opioids or sedatives. Reported effects include increased energy and alertness on one side, and relaxation, pain relief, confusion, or drowsiness on the other.

Potentially reported effects include:

• Alertness
• Energy
• Increased sociability
• Relaxation
• Drowsiness
• Sedation
• Changes in mood
• Changes in pain perception
• Nausea
• Constipation
• Dizziness

These are reported effects, not guarantees and not evidence that kratom provides an established medical benefit.

What Does Kratom Feel Like?

There is no single answer to what kratom feels like.

Some users describe stimulation, alertness, or energy, while others describe relaxation or sedation. Some people experience unpleasant effects such as nausea, dizziness, sweating, constipation, or vomiting.

Individual experiences can differ because of product composition, alkaloid concentration, frequency of use, individual sensitivity, and combinations with other substances.

Consequently, personal reports should not be treated as predictable medical outcomes.

What Is Kratom Used For?

People use kratom for a variety of traditional, personal, and self-directed reasons.

Reported or historical uses include:

• Energy and alertness
• Fatigue
• Physical discomfort or pain
• Relaxation
• Mood-related reasons
• Attempts to manage opioid withdrawal symptoms

A more detailed discussion of what kratom is used for, including the distinction between reported uses and established medical evidence, is available in Canuck Kratom's educational guide on what kratom is used for.

It is important to emphasize that these uses do not establish kratom as an approved treatment. NCCIH states that research remains limited and that kratom has not been shown to be safe and effective for treating opioid withdrawal or another medical condition.

Kratom Benefits: What Does the Research Actually Show?

Searches for kratom benefits often produce stronger claims than the scientific evidence supports.

Researchers are investigating whether particular kratom compounds might have therapeutic potential. However, human research remains limited, and there are important uncertainties concerning long-term safety, effectiveness, dosing, product consistency, and interactions.

It is therefore useful to separate four categories:

1. Traditional use: practices that have existed historically in Southeast Asia.
2. Self-reported effects: experiences described by people who use kratom.
3. Preliminary scientific findings: laboratory, animal, observational, or early human research.
4. Established medical treatments: therapies supported by sufficient clinical evidence and appropriate regulatory approval.

Kratom should not be described as a scientifically proven cure or guaranteed treatment for pain, anxiety, depression, fatigue, opioid withdrawal, or opioid use disorder.

Kratom Products and Forms

Modern kratom products can appear in several forms.

Common examples include:

• Whole or dried kratom leaves
• Kratom powder
• Kratom tea
• Kratom capsules
• Kratom extracts
• Concentrated products

A traditional leaf product and a concentrated extract can differ substantially in alkaloid concentration.

Readers researching botanical products may encounter Canuck Kratom's broader kratom collection, but product availability should not be interpreted as evidence that a product treats or prevents a medical condition.

Likewise, broader botanical categories such as organic herbs should not be interpreted to mean that “organic” automatically means medically safer. Natural, herbal, botanical, and organic are not synonyms for risk-free.

Red, Green, and White Kratom

Consumers may encounter commercial terms such as:

• Red vein kratom
• Green vein kratom
• White vein kratom
• Kratom strains
• Vein colors

These labels are commonly used within the kratom marketplace to distinguish products, but they should not be treated as scientifically standardized medical classifications.

Descriptions associated with red, green, or white varieties often come from marketplace terminology and user reports. Strong clinical evidence does not establish that one vein color reliably treats pain, anxiety, fatigue, depression, or another medical condition.

For readers researching the different commercial categories, Canuck Kratom provides separate collections for green vein kratom, red vein kratom, and white vein kratom.

A variety collection can also help readers understand the range of marketplace terminology through Canuck Kratom's kratom variety pack collection, but a product category should not be interpreted as proof of a particular therapeutic effect.

Kratom Dosage: Why There Is No Universal Safe Amount

People frequently search for kratom dosage, but there is no universally established medical dosage that can be recommended as safe and effective for treating a health condition.

Commercial products can differ in:

• Plant material
• Alkaloid concentration
• Extraction methods
• Product purity
• Contamination
• Added ingredients

Concentrated extracts can also have a very different chemical profile from ordinary leaf material.

For these reasons, copying a dosage from another person's experience or an online product listing does not establish that amount as medically appropriate.

Kratom Side Effects and Safety

Kratom safety is an important consideration because the plant can produce unwanted effects and, in some circumstances, serious adverse events.

Reported kratom side effects include:

• Nausea
• Vomiting
• Constipation
• Dizziness
• Drowsiness
• Dry mouth
• Sweating
• Itching
• Increased heart rate
• Increased blood pressure
• Loss of appetite

Less common but potentially serious problems reported in association with kratom include seizures, liver injury, severe confusion, and other toxic effects. NCCIH notes that serious effects have been reported and that the long-term effects of kratom are not well understood.

Health Canada has also warned that kratom may be associated with drowsiness, nausea, vomiting, seizures, liver toxicity, rapid heartbeat, abuse, and dependence.

Kratom Toxicity and Poisoning

Kratom toxicity can be more difficult to assess because commercial products vary considerably and some exposures involve multiple substances.

A 2026 CDC analysis of U.S. poison-center data found a substantial increase in kratom-related exposure reports between 2015 and 2025, with multiple-substance exposures associated with the most severe clinical outcomes. The CDC also noted a shift toward higher-potency alkaloid extracts as a safety concern.

Symptoms such as severe confusion, difficulty breathing, seizures, loss of consciousness, or other serious or rapidly worsening symptoms require urgent medical attention.

Kratom Contamination and Adulteration

Another safety issue is kratom contamination or adulteration.

Kratom products can vary in quality, and authorities have reported concerns involving contaminants such as heavy metals and disease-causing bacteria.

Adulteration is particularly important because a product marketed as kratom may contain additional substances or unusually concentrated alkaloids.

Consumers should not assume that a product is safe simply because its label says “natural,” “herbal,” or “botanical.”

Is Kratom Addictive?

Kratom can lead to physical dependence, and some regular users experience withdrawal after stopping.

It is important to distinguish:

• Tolerance: needing more of a substance to produce the same effect.
• Physical dependence: the body adapts to repeated exposure, so stopping can cause withdrawal.
• Addiction or substance use disorder: a pattern of compulsive use despite significant harm or impairment.

These concepts overlap but are not interchangeable.

Kratom Dependence and Withdrawal

Regular kratom use can result in kratom dependence syndrome in some people. Reported kratom withdrawal symptoms can include physical discomfort, sleep problems, irritability, mood changes, runny nose, and other symptoms.

The severity and duration can vary according to individual factors and patterns of use.

NCCIH specifically notes that regular users may experience withdrawal symptoms when they stop using kratom.

If someone believes they have developed dependence or is having difficulty stopping, discussing the situation with a qualified healthcare professional is safer than attempting to manage a significant substance-use problem alone.

Kratom and Medications

Kratom interactions remain an important area of research.

Kratom and its constituents may affect drug-metabolizing enzymes and other biological pathways, creating the possibility of pharmacokinetic interactions with medications. However, the clinical significance of many potential interactions is not yet fully established.

People taking prescription or over-the-counter medications should not assume that kratom is safe simply because a specific interaction has not been documented.

Kratom and Alcohol

The safety of combining kratom and alcohol has not been adequately established.

Because both substances can affect the central nervous system, combining them may increase uncertainty around sedation, impaired judgment, or other adverse effects.

The same caution applies to combining kratom with other psychoactive substances.

Do not use the absence of a documented interaction as evidence that a combination is safe.

Kratom vs. Opioids

Kratom and conventional opioids are different substances.

Prescription opioids and illicit opioids include chemically distinct drugs such as morphine, oxycodone, and fentanyl. Kratom instead contains plant alkaloids such as mitragynine and 7-hydroxymitragynine.

The important similarity is pharmacological: some kratom alkaloids interact with opioid receptors.

This helps explain why kratom can produce some opioid-like effects and why dependence and withdrawal are relevant safety considerations. It does not make botanical kratom chemically interchangeable with conventional opioids.

Kratom vs. Coffee and Caffeine

Kratom and coffee are botanically related because both plants belong to the Rubiaceae family.

However, they are not the same substance.

Coffee's primary psychoactive compound is caffeine, whereas kratom's best-known active alkaloids include mitragynine and 7-hydroxymitragynine.

Kratom therefore should not be described as simply “strong coffee” or another form of caffeine.

Kratom vs. Kava

Kratom and kava are different botanical substances with different chemical constituents and pharmacology.

Kratom contains alkaloids such as mitragynine, while kava is associated primarily with compounds called kavalactones.

Their effects, risks, interactions, and regulatory status should therefore be considered separately.

Kratom vs. CBD

CBD, or cannabidiol, is a cannabinoid associated with the cannabis plant.

Kratom contains alkaloids, including mitragynine and 7-hydroxymitragynine.

Because their active constituents and pharmacological mechanisms differ, kratom and CBD should not be considered interchangeable.

Natural Kratom vs. Concentrated 7-OH Products

One of the most important recent developments in kratom safety involves the distinction between traditional botanical kratom and products containing concentrated 7-hydroxymitragynine.

7-OH occurs naturally in kratom leaves in relatively small quantities. Modern products may instead contain enhanced or concentrated amounts of 7-OH.

The FDA has specifically warned consumers about concentrated 7-OH products, including tablets, gummies, drink mixes, and shots. The agency distinguishes these products from the naturally occurring trace amounts of 7-OH in kratom leaf.

In July 2026, the DEA announced a temporary scheduling process for 7-OH above a proposed threshold and certain synthetic 7-OH-related compounds. This regulatory development concerns particular compounds and concentrations and should not be interpreted as automatically making every botanical kratom leaf product federally controlled.

What Does Scientific Research Say About Kratom?

Kratom research is expanding, but important questions remain unanswered.

Researchers are studying:

• Kratom pharmacology
• Mitragynine
• 7-hydroxymitragynine
• Opioid-receptor activity
• Metabolism
• Potential therapeutic applications
• Dependence
• Withdrawal
• Toxicity
• Drug interactions
• Long-term health effects

NCCIH describes kratom research as being in its early stages and emphasizes that much remains to be learned about both its short- and long-term effects.

Laboratory findings, animal studies, observational research, traditional use, and user reports can help researchers formulate hypotheses, but they do not automatically establish that kratom is an effective or safe treatment in humans.

Is Kratom Safe?

There is no simple yes-or-no answer that applies to every person and every product.

Kratom has pharmacological effects and can produce adverse effects. Product composition varies, long-term safety remains incompletely understood, and interactions with other substances are an important concern.

The FDA has not approved kratom as a drug for any medical use, and NCCIH states that kratom has not been shown to be safe and effective for treating any medical condition.

Anyone who takes prescription medication, has a medical condition, is pregnant or breastfeeding, or is concerned about dependence should discuss kratom use with an appropriately qualified healthcare professional.

Is Kratom Legal?

Kratom legality varies by jurisdiction. There is no single worldwide legal status.

In the United States, NCCIH currently states that kratom and its compounds are not listed in the federal schedule of controlled substances, although individual states and local jurisdictions may regulate or prohibit kratom.

The legal situation surrounding specific kratom compounds is also changing. For example, the DEA began a temporary scheduling process in 2026 involving 7-OH above a proposed threshold and certain synthetic related compounds.

In Canada, Health Canada has warned about unauthorized kratom products and has stated that it has not authorized the sale of products containing kratom in the contexts described in its public alerts.

Because laws and enforcement policies can change, readers should check the current rules of their country, province or state, and municipality rather than relying on a general statement that kratom is simply “legal” or “illegal.”

Frequently Asked Questions About Kratom

What is kratom?

Kratom is the common name for Mitragyna speciosa, a tropical tree in the coffee family native to Southeast Asia. Its leaves contain numerous alkaloids, particularly mitragynine and 7-hydroxymitragynine, that can affect the nervous system.

What is kratom made from?

Kratom products are made from the leaves of the Mitragyna speciosa tree or from preparations and extracts derived from those leaves.

Where does kratom come from?

Kratom comes from Southeast Asia, particularly areas including Thailand, Indonesia, Malaysia, Myanmar, and surrounding regions where Mitragyna speciosa grows naturally.

What does kratom do?

Kratom can produce different effects depending on the person and product. Reported effects include increased alertness and energy as well as relaxation, drowsiness, and changes in pain perception. Unwanted effects such as nausea, constipation, dizziness, and rapid heart rate can also occur.

How does kratom work?

Kratom's major alkaloids interact with several biological targets. Mitragynine and 7-hydroxymitragynine can interact with opioid receptors, including mu-opioid receptors, contributing to some of kratom's opioid-like effects.

Is kratom a drug?

Kratom is a psychoactive botanical substance with pharmacological effects. Its legal classification varies by jurisdiction.

Is kratom an opioid?

Kratom is not chemically identical to conventional opioids, but some kratom alkaloids interact with opioid receptors and can produce opioid-like effects.

Is kratom addictive?

Kratom can lead to dependence in some regular users, and withdrawal can occur after stopping. Dependence and addiction are related but medically distinct concepts.

Is kratom dangerous?

Kratom can carry health risks. Reported adverse effects range from nausea and dizziness to less common but serious problems such as seizures and liver injury. Risk can also increase when kratom is combined with other substances.

What are the side effects of kratom?

Reported side effects include nausea, vomiting, constipation, dizziness, drowsiness, sweating, itching, dry mouth, increased heart rate, and loss of appetite. Serious adverse events have also been reported.

How long does kratom last?

There is no single reliable duration that applies to every person or product. Effects can vary according to the preparation, alkaloid concentration, amount used, individual metabolism, and other factors.

How long does kratom stay in your system?

The time kratom compounds remain detectable can vary depending on the specific alkaloid, frequency of use, metabolism, product composition, and testing method. There is no universal timeframe that applies to everyone.

Can kratom cause dependence?

Yes. Regular use can lead to physical dependence in some people, and stopping after repeated use can produce withdrawal symptoms.

What happens when you stop taking kratom?

Some regular users experience withdrawal symptoms after stopping. Symptoms can vary in severity and may include physical discomfort, sleep disturbance, irritability, mood changes, and other symptoms.

Can kratom interact with medications?

Potential interactions are a significant safety concern, but many kratom-drug interactions have not been adequately characterized. Anyone taking medication should consult a qualified healthcare professional before using kratom.

What should you know before using kratom?

Kratom is pharmacologically active and is not risk-free simply because it is plant-based. Product composition can vary, dependence is possible, serious adverse events have been reported, and the long-term evidence remains incomplete.

The Bottom Line: What Is Kratom?

Kratom is a Southeast Asian tropical tree called Mitragyna speciosa whose leaves contain naturally occurring alkaloids, especially mitragynine and 7-hydroxymitragynine. These compounds can interact with opioid receptors and may produce a mixture of stimulant-like, relaxing, sedative, and other psychoactive effects.

People have used kratom traditionally in Southeast Asia, while modern users report a variety of reasons for using it. However, reported uses and traditional practices are not the same as proven medical treatments. Current research is still developing, and important questions remain about long-term safety, effectiveness, dependence, toxicity, and drug interactions.

The distinction between ordinary botanical kratom and concentrated 7-OH products is particularly important. Regulators have raised specific safety concerns about enhanced 7-OH products, and their legal status is evolving.

For anyone researching kratom, the most useful approach is to consider both sides of the evidence: understand what the plant and its alkaloids are known to do, while recognizing where scientific evidence remains limited or uncertain.