Keeping bones healthy and warding off osteoporosis. A recent study of animals at Texas A&M University showed drinking orange or grapefruit juice increased their bone density.

Scientists believe juice benefits humans in the same way and recommend drinking a glass or two of citrus juice each day. In Britain osteoporosis affects one in three women and one in 12 men.

Chemicals that stop harmful molecules in the body from damaging cells in bones and making them brittle.