harmful.
Unlike some nutrients, the body has limited ability to eliminate excess iron.
Large amounts can accumulate and potentially damage organs, including the **liver**. NIH guidance notes that excess iron may damage the liver and other organs.
This is why iron should generally not be taken long-term simply because someone feels tired.
Fatigue has many causes, and blood tests can help determine whether iron deficiency is actually present.
### Warning:
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
