Kava is a plant that grows in the Pacific Islands. People there have traditionally used it for relaxation and in ceremonies. In recent years, it’s become popular in alternative wellness communities in the West.
But despite its benefits, kava has also been tied to liver damage, which has led to debate about its safety.
This article will look at the research on kava and liver damage to separate what’s true from what’s not. We’ll also provide tips for how to use kava safely, and debunk the kava liver damage myth.
The origins of the kava liver damage myth
Early reports and concerns
In the late 1990s and early 2000s, some reports began to connect kava to liver problems. By 2002, the German Federal Institute had documented about 40 cases of severe liver issues linked to kava use in Europe and the United States.
These reports prompted countries like Germany to ban kava products.
Potential contributing factors
The way kava is extracted and the quality of the product itself may play a role in whether it causes liver problems.
For example, research suggests that using acetone as an extraction solvent may make people more likely to experience negative side effects. Contaminants in kava products might also increase the risk of liver issues.
Analyzing the evidence: Kava’s safety profile
So, is kava safe? How worried should you be about liver damage?
Recent research and findings
Recent research suggests the risk of liver damage from kava is very low. One study estimated that liver damage only happens in 1 out of 1 million daily doses.
Researchers have also found that other factors, like existing liver conditions or drinking alcohol at the same time, may have played a part in the cases of liver problems.
German court rulings
Back in 2014, two courts in Germany looked into the issue and decided that the connection between drinking kava and liver problems wasn’t “well-established” in most cases.
Comparison to other treatments
Compared to other anxiety treatments, kava’s benefits seem to outweigh the risks. Even in cases where it seemed like kava could have been the cause of liver problems, the number of cases was less than 0.02 per one million daily doses. That’s lower than the risk from diazepam, a common anxiety medication.
World Health Organization (WHO) findings on kava
For many years, kava was considered a dangerous herb that could damage the liver. But a recent study challenges that idea.
WHO study summary
A World Health Organization (WHO) study called “Assessment of the risk of hepatotoxicity with kava products” found limited evidence connecting kava to liver damage.
The study found that pure kava has minimal side effects.
Potential overestimation of risks
Some experts believe previous analyses overestimated the risks of kava and underestimated how well it works.
How to consume kava safely and responsibly
Dosage and Frequency
While research is still ongoing, the general consensus is that kava is safe when used in moderation. Most sources say that under 280 mg per day is likely a safe dose.
A clinical study that looked at how well kava works to treat Generalized Anxiety Disorder (GAD) reported that kava is safe as long as people don’t take more than 280 mg per day.
It’s always a good idea to use any substance, even natural supplements like Rescue Remedy, in moderation.
Precautions and Considerations
If you have any health conditions or you take prescription medications, talk to your doctor before using kava.
It’s also important to avoid alcohol if you’re taking kava. Don’t combine the two.
When you buy kava, make sure you’re buying from a reputable supplier. The best suppliers will have their products tested in a lab to ensure they’re not contaminated.
Start with a low dose of kava and slowly increase it until you reach the effect you’re looking for.
Frequently Asked Questions
What does kava do to the heart?
Kava’s effects on the heart are still being studied. Some research suggests kava might have a mild blood pressure-lowering effect, potentially beneficial for those with hypertension. However, other studies have not found significant impacts on heart rate or blood pressure. More research is needed to fully understand kava’s cardiovascular effects, especially in individuals with pre-existing heart conditions.
Is kava bad for the kidneys?
The impact of kava on kidney health isn’t definitively established. There isn’t strong evidence suggesting kava is directly harmful to healthy kidneys when consumed responsibly. However, individuals with pre-existing kidney issues should exercise caution, as any substance processed by the kidneys could potentially exacerbate existing problems. It’s always best to consult a healthcare professional if you have concerns.
How likely is liver damage from kava?
The risk of liver damage from kava is a complex and debated topic. While some cases of liver toxicity have been linked to kava consumption, modern research suggests these instances may have been due to factors like poor kava quality, use of improper plant parts (like stems and leaves instead of the root), or concurrent use of alcohol or other substances known to harm the liver. When consumed responsibly, using noble varieties and avoiding other hepatotoxic substances, the risk appears to be low, but caution is still advised.
Why was kava taken off the market in some countries?
In the early 2000s, kava was temporarily banned or restricted in several European countries and Canada due to concerns about liver toxicity. These bans were largely based on case reports and preliminary research. However, many of these restrictions have since been lifted or modified as scientists gained a better understanding of the factors contributing to kava-related liver issues and implemented stricter quality control measures.
The Bottom Line
Early reports suggested that kava could cause liver damage, but more recent research, including findings from the World Health Organization (WHO), indicates that kava poses a very low risk of liver damage when consumed responsibly.
You can minimize potential risks and enjoy the benefits of kava by:
- following recommended guidelines
- choosing quality products
- talking with a doctor
When used with caution and respect for its potential effects, kava can be a valuable tool for relaxation and overall well-being.