Mitragyna speciosa (commonly known as kratom) is a tropical evergreen tree with a height of 30m and a trunk of up to 4.5m in diameter. It is native to Southeast Asia (Thailand, Indonesia, Malaysia, Myanmar and Papua New Guinea), where it has been used in traditional medicine since at least the beginning of the 19th century for its healing properties and psychoactive effects.

Kratom is surprisingly stable, even when stored at home. A test was performed during which a sample of kratom was divided into three parts. The first sample was placed into a sealed zip lock bag in the freezer, the second sample was stored at room temperature in a drawer and the third sample was stored open in a jar set on top of a furnace. Before and after the six-month experiment, kratom was analysed by liquid chromatography and mass spectrometry.

Surprisingly, the experiment did not show any significant differences in all three samples. Even the one that was put on the furnace in the open jar did not significantly differ from the other samples. Subsequent ‘bio-tests’ confirmed that even subjective potency remained essentially unchanged.

To sum up, you do not need to worry about the stability of your kratom. If you put your material in a zip lock bag and throw it in the back of the pantry, it will be perfectly fine for a long time.