Kratom powder is a ground-up plant product made from the dried leaves of a tropical tree native to Southeast Asia. The tree, part of the same botanical family as coffee, grows 4 to 16 meters tall in countries like Thailand, Malaysia, Indonesia, the Philippines, and New Guinea. Its leaves contain dozens of active compounds that interact with opioid receptors in the brain, producing effects that range from mild stimulation at low doses to sedation and pain relief at higher doses. Kratom is not approved by the FDA for any medical use, and it carries real risks, but it has become widely available in the U.S. as a dried powder sold online and in smoke shops.
How Kratom Powder Is Made
The production process is straightforward but varies depending on the supplier. After harvesting, leaves are sorted, washed, and then dried either indoors on shelved racks with fans or outdoors on sheets under direct sunlight. Some producers ferment the leaves before drying, which changes the alkaloid profile. Once dried, the leaves are ground into a fine powder using commercial grinders. In Western countries, this powder is typically sold loose, packed into capsules, or occasionally pressed into tablets.
The drying method matters because it influences the chemical makeup of the final product. Indoor drying in darkened rooms preserves certain alkaloids differently than sun drying, and fermentation tends to shift the balance of active compounds toward those associated with relaxation. These processing differences are one reason kratom products can vary so much from batch to batch.
What It Does in the Body
Kratom’s effects come primarily from an alkaloid called mitragynine, the most abundant active compound in the leaves. Once ingested, the body converts some of that mitragynine into a more potent compound called 7-hydroxymitragynine. Both of these act as partial agonists at the brain’s mu-opioid receptors, the same receptors targeted by morphine and other opioid painkillers. However, mitragynine binds with lower strength than morphine and, unlike morphine, does not activate the specific signaling pathway most associated with respiratory depression.
The effects are dose-dependent. At low doses of roughly 1 to 5 grams, kratom tends to act as a stimulant, producing increased energy, alertness, and sociability. At higher doses of 5 to 15 grams, the opioid-like effects dominate: sedation, pain relief, and a sense of calm. Kratom’s alkaloids also interact with serotonin, dopamine, and norepinephrine systems in the brain, which contributes to its complex and sometimes unpredictable range of effects.
Red, White, and Green Strains
Kratom powder is commonly marketed by “vein color,” with red, white, and green varieties each claiming distinct effects. Red strains are sold as calming and pain-relieving, white strains as stimulating and energizing, and green strains as a balance between the two. User surveys generally support this pattern: people who use white strains consistently report more stimulation, while red strain users report more relaxation.
The reality is more complicated. When researchers have analyzed the actual alkaloid content across different color strains, they found no significant chemical differences between them. The color distinctions likely come from variations in drying and fermentation rather than from fundamentally different plant chemistry. Red vein kratom, for instance, typically undergoes longer drying or fermentation, which may subtly shift the alkaloid balance. But the differences users report may be driven as much by marketing and expectation as by measurable chemical variation.
Why People Use It
The most common reasons people seek out kratom are chronic pain management, energy and focus, and managing opioid withdrawal. Among the roughly 40 million Americans living with chronic pain, some have turned to kratom as what they consider a natural alternative when prescription options become unavailable or undesirable. Case reports document individuals using kratom tea multiple times daily to manage both pain and opioid withdrawal symptoms, with some reporting substantial pain relief and improved alertness.
Kratom has gained particular attention as a self-directed tool for opioid withdrawal. People who are physically dependent on prescription painkillers sometimes use kratom to ease the transition off those medications, essentially replacing one opioid-receptor-activating substance with a weaker one. This use is not medically supervised in most cases and is not endorsed by any major medical organization, but it is a significant driver of kratom’s popularity.
Risks and Side Effects
The FDA has issued repeated warnings against kratom use, citing risks of liver toxicity, seizures, and substance use disorder. In rare cases, deaths have been associated with kratom, typically when it was used alongside other substances. The agency has also documented cases of neonatal abstinence syndrome in newborns whose mothers used kratom during pregnancy, with symptoms including jitteriness, irritability, and muscle stiffness.
Regular kratom use can lead to physical dependence. People who develop moderate to severe dependence typically experience withdrawal symptoms within 12 to 48 hours of their last dose. These symptoms resemble mild opioid withdrawal: muscle aches, restlessness, insomnia, nausea, sweating, runny nose, irritability, and depressed mood. Withdrawal generally lasts 1 to 3 days, though some people report symptoms persisting for up to a week. Tolerance also develops with repeated use, meaning people need increasing amounts to get the same effect.
Contamination Concerns
Because kratom is sold as an unregulated supplement rather than a pharmaceutical product, quality control is inconsistent. The FDA tested 30 kratom products from various sources and found significant levels of lead and nickel, often at concentrations exceeding safe daily exposure limits for oral intake. Some products were dramatically contaminated. One red vein Sumatra product contained nickel levels above 22,000 nanograms per gram, and a Maeng Da product had lead levels of 1,200 nanograms per gram. For heavy daily users, cumulative exposure to these metals could potentially cause nervous system damage, kidney problems, anemia, or high blood pressure over time.
Bacterial contamination is also a concern. The FDA has issued public warnings after kratom products were found to be contaminated with Salmonella, leading to documented illnesses. Without standardized testing requirements, there is no reliable way for consumers to know whether a given batch of powder is clean.
Legal Status
Kratom occupies a legal gray area in the United States. It is not federally scheduled as a controlled substance, meaning it is legal to buy and sell in most of the country. However, several states and municipalities have banned it outright, and the FDA has taken an increasingly cautionary stance. The agency does not approve kratom for any medical use and continues to actively warn consumers against using it. In Southeast Asia, kratom’s legal status varies by country, with Thailand having recently legalized it after decades of prohibition while other nations maintain restrictions.