Coffee and Tea, some Fruits (raspberries, blackberries, blueberries), and some Herbs & Spices (oregano, peppermint, chamomile) can reduce iron absorption by 50% – 90%.
The absorption of iron for Legumes, Rice and Grains (wheat bran, whole wheat, oats, brown rice) is very low (about 1%–2%).
Calcium partly inhibits iron absorption and can be found in Milk, Cheese, Yogurt, Figs, Almonds, Sardines, Tofu and Rhubarb.
Heartburn and acid reflux medication can also reduce iron absorption.