Although it’s been used in traditional medicine for centuries, scientific evidence supporting its health benefits is limited.
That means some supplement products may not contain what the label says.
Getty Images / Susan Southward
What Is Japanese Knotweed?
Getty Images / Susan Southward
Japanese knotweed is an herbaceous perennial plant native to Asia.
It is part of thePolygonaceaefamily and is sometimes calledReynoutria japonicaorPolygonum cuspidatum.
It was first introduced to the United States in the 1800s as an ornamental plant.
Despite its invasive nature, Japanese knotweed has been used for centuries for its medicinal properties.
Compounds in Japanese Knotweed
Japanese knotweed is known to contain a long list of bioactive compounds.
Many of these compounds have been linked to potential health benefits.
In fact, Japanese knotweed has been found to contain more antioxidant activity than many other plant species.
Does Japanese Knotweed Have Health Benefits?
For the most part, studies have primarily been performed in laboratory options rather than on humans.
According to the study, resveratrol andglucosidesshowed the highest levels of anti-inflammatory effects.
These compounds were found to inhibit inflammatory substances in the body.
Other lab studies have suggested that Japanese knotweed may have antiviral and anticancer effects as well.
Is Japanese Knotweed Safe?
Because there are so few human trials, not enough is known about the safety of Japanese knotweed.
However, some of the compounds in Japanese knotweed have known possible side effects.
Resveratrol is a well-researched compound found in Japanese knotweed.
With short-term use, resveratrol does not typically cause side effects.
The best way to avoid potential side effects is to use Japanese knotweed only as directed.
Dosage: How Much Japanese Knotweed Should I Use?
As with other aspects of Japanese knotweed, information regarding safedosageis not available.
This is simply due to a lack of credible research.
In lab studies, the efficacy of Japanese knotweed seems to be dependent on the dose.
How to Store Japanese Knotweed
For quality purposes, it’s important to store Japanese knotweed properly.
Store Japanese knotweed supplements in a cool, dry place and keep them out of direct sunlight.
Cupboards and pantries are safe spots to store Japanese knotweed and other herbs or supplements.
Dried Japanese knotweed herbs can be stored in a refrigerator or freezer, if desired.
Otherwise, store dried Japanese knotweed in a cool, dry place.
However, it is more commonly used in supplement form.
When it comes to your health, nothing beats a well-balanced diet.
Fresh Japanese knotweed can be grilled, cooked in other ways, or eaten raw.
Numerous recipes are available online that detail ways to add Japanese knotweed to cooked dishes or baked goods.
Japanese knotweed is said to have a tart flavor, similar to rhubarb.
Japanese knotweed supplements are sold online and in various health food or supplement stores.
you could find Japanese knotweed supplements in the form of powders, capsules, tinctures, and extracts.
Most Japanese knotweed supplements areveganandgluten-free.
However, some capsules may containgelatin, a substance derived from animals like cows and pigs.
Summary
Japanese knotweed is a perennial herb and invasive species that may have medicinal benefits.
Talk with a healthcare provider before using Japanese knotweed to learn if it is right for you.
Japanese knotweed is sometimes confused with Americanpokeweed(Phytolacca americana), another invasive species.
Despite their somewhat similar appearance, the two plants are not the same.
Japanese knotweed is edible and can be eaten raw or cooked.
Be sure to clean Japanese knotweed before eating it.
Japanese knotweed has long branches, thick stems, and large blade leaves.
It also produces white flowers.
The stems of Japanese knotweed can grow to be quite tall and straight, somewhat resembling bamboo.
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