Absorption of iron into the gut is reduced by drinking tea and milk, according to the NHS.Nonetheless, if you drink orange juice beforehand, this can be beneficial.
The NHS states: “Vitamin C (sometimes called ascorbic acid) may help the body to absorb iron, so to get the most from the food you eat, have Vitamin C rich foods with meals; for example, fresh vegetables or fruit, or drinks such as fresh orange juice.”
But it notes “tea may reduce the absorption of iron from foods” so you should avoid drinking tea directly before, after or with meals and only drink tea in between meals”.
Non-prescribed food supplements are available over-the-counter and can be taken if an adequate iron intake is not being achieved.