What do the states mean?+
- Solid: well studied, and it works.
- Half-there: the science is still forming.
- A ghost: almost no real studies.
- Hollow: well studied, and it does not work.
- A cord: the pair itself has been tested together.
- Air: nobody has ever tested this pair.
The full scoring method: How we score
Can you take green tea extract and iron together?
Don’t take them together.
As of August 2026, green tea extract and iron have been tested together in 1 trial, in healthy women with low iron stores, and a harm signal was reported. Scored under the same rules as everything here.
8 studies · 1 tested the actual pair
What you’re seeing
- Green tea extract renders half-there: for weight and body fat, the science is still forming.
- Iron renders solid: for anaemia and iron levels, it is well studied and it works.
- The woven cord is the rare part: one trial gave both together, and a harm signal was reported.
You can tell before you read a word.
Magnesium + L-theanine are sold together in the same aisle. No trial has ever tested the pair. When that is true, we draw nothing between them. The nothing is the review.
The pair trial
- 2005Crossover trial · 30 people · healthy women with low iron stores · harmsource
The other 7 studies on file tested each one alone. See all 8 studies
Fair questions
Is it safe to take green tea extract and iron together?+
The studies on this page gave both together and reported no harm from the combination. That is not the same as a safety trial, and it says nothing about your dose or your medication.
How many studies is this based on?+
1 that gave the pair together. The papers are listed above with links to the source.
Deeper
What each one is on its own+
Green tea extract
- Weight and body fathalf-there
- Cancer preventionhollow
- Cholesterola ghost
- Inflammationhalf-there
- Memory and focushalf-there
Iron
- Anaemia and iron levelssolid
- Memory and focushalf-there