11.   Wheat bran, though, can partly block absorption of calcium from other foods, for example, the milk in a bowl of bran cereal.

12.   But a new pill blocks absorption of almost a third of the fat which people eat.

13.   By blocking water absorption, the disease causes the fruit to be small, hard and commercially worthless.

14.   In another orbital experiment, a type of mustard plant failed to thrive in space because water droplets clustered about the roots, blocking absorption of nutrients.

15.   Some weight control compounds act by blocking absorption in the gut of fatty acids, or by inhibiting the metabolism of fatty acids.

16.   The group says olestra causes gas, bloating, diarrhea and nausea and blocks absorption of some nutrients.

17.   They work by topping up the thyroid gland with iodine, which blocks the absorption of radioactive iodine.