requiring transplantation.
The risk appears to be uncommon, but it illustrates an important point: concentrating a plant into capsules can expose the body to much larger doses of certain compounds than drinking the plant as a normal beverage.
## 7. Kava
Kava is an herbal product sometimes promoted for relaxation, stress, or sleep.
However, kava supplements have been associated with cases of serious liver injury.
Reported problems have included:
* hepatitis
* severe liver damage
* liver failure
* rare cases requiring liver transplantation
The FDA has previously issued warnings about the potential for severe liver injury with kava-containing supplements.
People with existing liver disease or those taking medications that affect the liver should be particularly cautious.
## 8. Multi-Ingredient Herbal and “Detox” Supplements
One of the biggest challenges with herbal supplements is that a product may contain many ingredients at once.
Examples include products marketed for:
* weight loss
* bodybuilding
* “liver cleansing”
* detoxification
* energy
* metabolism
* sexual
