Coffee, tea, milk, cocoa and wine inhibit iron absorption. Offal, black pudding, spinach, seafood, legumes and oilseeds provide iron. Now you know which foods to use to make up for your iron deficiency.
4 coffees a day = ½ teaspoon of salt lost in urine. 1 hour of sport = ½ teaspoon of salt lost. In this case, you'd need 1 teaspoon full of salt just to recover the lost salt.