How Long Do Kratom Effects Last?

"How long does Kratom last?" is a popular question often asked by Kratom users. When we talk about how long Kratom can last, we actually mean the duration of its effects on the human body. From a general perspective, depending on the strain you’re using, the effects of Kratom can last for around 2-8 hours. It's also important to remember that Kratom effects vary from user to user. So, it's likely that two persons will feel different effects after consuming the same Kratom serving size. Eating right before taking Kratom can also change the time the effects are felt, as well as the serving size amount.

What is the half-life of Kratom?

Kratom half-life refers to the time the body needs to eliminate half of your consumed serving size. There're two main active chemical compounds in Kratom: Mitragynine and 7-hydroxymitragynine. Both these compounds have a half-life of about 3 hours, meaning the user's body requires three hours to eliminate half of the serving size of these compounds. 

Kratom half-life gives you an idea about the estimated time your body needs to completely eliminate the serving size from its system. However, you must remember that the half-life may decrease if your body is tolerant to Kratom. Therefore, people who develop a slight tolerance to Kratom may need less time to completely wear off its effects. 

So, knowing the Kratom half-life is partially helpful in figuring out how long its lasting period is in the human system. Calculating the exact time for which a Kratom serving size remains in the human system is almost impossible; however, you can get a general idea if you know the significant factors it depends on. In this article, we'll be discussing all the significant factors that impact the duration of Kratom's effects on the human body. 

Factors affecting the duration of Kratom's effects in the user's system

How long Kratom lasts in the human body depends on several factors, such as:

  • Serving size

The Kratom powder serving size is a significant factor affecting how long it stays in the human system. If you have taken a large serving size, you can expect it to stay in your system for longer. The larger your serving size, the longer it will remain in your body to produce effects.

Experts believe a standard serving size (1-2 grams) of Kratom can stay in the human system for 2-3 hours. A moderate serving size (3-5 grams) can last 4-6 hours, while a higher serving size (5-8 grams) can stay in your system for up to 5-8 hours. Remember, we’re not talking about the intensity of effects here, which gradually decreases over time after you take your preferred Kratom serving size. You can learn more about suggested Kratom serving sizes in the “Kratom Serving Size” section on our “NuKine Learning Center” page.

  • Usage frequency

If you use Kratom frequently, you may start to build a slight tolerance to it, decreasing the duration of its effects. On the other hand, people who use Kratom infrequently may feel its effects for longer. Therefore, frequency of use plays a crucial role in determining how long Kratom lasts in your system.

Besides increasing the duration of effects, high usage frequency also increases your dosage requirement. For example, if you take 1 gram of Kratom in the beginning to get the desired effects and start to build up a tolerance for it, you may need to double your dosage to get the same desired effects. This is why at NuKine Wellness we strongly recommend that you take 1-3 day breaks if you do feel you’re starting to build a tolerance. After you take a 1-3 day break, you can simply start back at your original preferred serving size.

  • Kratom strain

The strain of Kratom you consume impacts how long it stays in your system. Some strains are more potent than others, making them last longer. NuKine Wellness has several popular Kratom strains, including:

  • Red vein kratom
  • Green vein kratom
  • White vein kratom 

These strains are different from each other in terms of potency, color, chemical composition, and effects. Red vein Kratom is a highly potent and has intense effects, but the duration of the effects are known to last the shortest. Some users report experiencing the longest effects when using White Kratom. The duration of effects of Green vein Kratom lies in between Red and White strains. 

These strains are further categorized into sub-strains depending on the location where they’re grown. For example, our NuKine Wellness Red vein kratom menu includes Red Bali, Red Borneo, and Red Maeng Da. Our White vein Kratom menu includes White Maeng Da, White Borneo, and White Bali, and our Green vein Kratom menu includes Green Bail, Green Borneo, Green Maeng Da and Green Malay. To learn more about the different effects of each strain, visit the “Kratom Strains” section on our “NuKine Learning Center” page.

  • Method of consumption

The way you consume Kratom can also impact the duration of its effects. Taking Kratom in the form of capsules or powder may last longer in your system as capsules take time to release active compounds of Kratom in your body. On the other hand, taking Kratom powder in capsule form, will also take longer to produce effects, rather than taking Kratom powder by itself without the capsule. 

If you consume Kratom tea, it won't last long in your system as the body absorbs the compounds from tea more quickly, making the onset of effects fast. Other methods of consumption have their specific duration of effects. For example, Kratom oil and tinctures stay in the human system longer than tea. Kratom vaping has the shortest staying time in the human body. That's because the Kratom alkaloids from vapes are more quickly absorbed by the body, and the onset of effects is also fast. At NuKine Wellness, we do not recommend vaping Kratom or smoking Kratom. Mitragyna speciosa is a wonderful plant that’s helped millions of people, but it must be respected. That's why at NuKine Wellness we only sell 100% all-natural Kratom powder and Kratom capsules. To learn more about our recommend ways of consumption, you can visit our NuKine Wellness blog and read our “Different Ways To Take Kratom Powder” article. 

  • Body chemistry

Your body chemistry is critical in determining how long Kratom compounds can last in your system. Body chemistry includes age, metabolism, weight, medical conditions, and genetics. Kratom may last longer in the system of an overweight person because of the slow absorption of its active compounds by the body. Overweight people may also experience the effects of Kratom longer than someone who is smaller. 

People with a faster metabolism need less time to eliminate Kratom from their system than others. A faster metabolism may also decrease the duration of effects in the users. The age of the user may also impact the lasting period of Kratom. An aged individual has a slower metabolism as compared to a younger one, making the Kratom effects last longer in their body. 

Some people are tolerant of Kratom due to genetic factors, decreasing the staying time of Kratom compounds in their body. However, such cases are rare. 

Medical conditions can impact the human body's capability to absorb and eliminate Kratom compounds. For example, individuals with liver disorders cannot eliminate Kratom from their bodies as fast as healthy ones, causing the Kratom compounds to stay in their system for longer. The effects of Kratom may last longer in such people. The same is true for people with kidney disorders. 

  • Water or food intake

If you take Kratom with water or food, its absorption by the body may become slow, causing it to stay for a longer period of time in the system. In contrast, if you consume Kratom on an empty stomach, the absorption of compounds and onset of effects will be quick, decreasing its retention time in the body system. This is why many users opt to take Kratom powder on an empty stomach, so that the effects will be more intense.

  • Body fat

Kratom alkaloids are fat-soluble. So, if your body's fat percentage is high, Kratom alkaloids may last longer by getting stored in fat cells. The higher the body fat percentage, the longer it may take to eliminate Kratom from human body system. 


As you can see, there's a wide range of factors affecting how long Kratom lasts in the human body. So, it's almost impossible to determine the exact time for which Kratom can last in your system. The best way to calculate Kratom's lasting time in your system is through a practical approach. You can take a standard Kratom serving size and examine the onset of its effects in your body and how long they last. However, we recommend always consulting with your doctor before taking Kratom. That's because your doctor is the best person that knows your body chemistry, metabolism speed, body weight, and, more importantly, tolerance for Kratom. Take Kratom as per your doctor's instructions and calculate how long your body takes to completely wear off its effects. When it comes to choosing the correct strain and serving size of Kratom, again, your doctor is the best person to consult with. You can choose between NuKine Wellness Red, Green, and White strains of Kratom as per your doctor's recommendation. 

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Disclaimer: The information provided in this article is intended to provide general  information only. The information in this article does not constitute medical, health, benefit advice, and does not attempt to give you advice that relates to your specific circumstances. Kratom has not been evaluated by the Food and Drug Administration FDA, and is not intended to diagnose, prevent, treat or cure any diseases or health conditions. Therefore any information on this website is presented solely as the opinions of their respective authors who in which do not claim in any way shape or form to be medical professionals providing medical advice, and do not necessarily express the views of NuKine Wellness, or any of its subsidiaries or affiliates.


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