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Accidental iron overdose can be particularly dangerous in children, so iron supplements should always be stored securely.
## 6. Green Tea Extract
Drinking ordinary brewed green tea is generally very different from taking a concentrated green tea extract.
Green tea extracts are found in some:
* weight-loss products
* “fat burner” supplements
* energy formulas
* antioxidant supplements
Concentrated extracts have been linked to cases of acute liver injury.
NIH’s LiverTox database documents clinically apparent liver injury associated with green tea extract, including rare severe cases 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.
