This question is about Nutrition
You should not take green tea extract and iron together. Green tea
To avoid this, consider taking green tea supplements two hours before or after eating iron-rich foods like meat, poultry, shellfish, beans, tofu, and fortified breakfast cereals.
Fan F. S. (2016). Iron deficiency anemia due to excessive green tea drinking. Clinical case reports, 4(11), 1053–1056. https://doi.org/10.1002/ccr3.707