21.   Moreover, within two weeks your body will need larger doses, which can lead to addiction.

22.   Older people save on prescriptions because their bodies need less medicine, so doctors give them reduced doses.

23.   Not every body needs extra calcium, for example, or can even tolerate it.

24.   Obviously, their growing bodies need good-for-you-food.

25.   Our bodies need iodine to make the thyroid hormone thyroxine, which is vital for developing brains.

26.   Preg is considered safer because it is more dependent on individual metabolism to determine what the body needs.

27.   The body needs time to acclimate, typically two days.

28.   The body needs water at the cellular level for a host of metabolic processes, including kidney, gastrointestinal and brain functions, Pacheco said.

29.   The body needs to turn on blood vessel growth to repair wounds and to form the blood-rich lining of the uterus during menstruation and pregnancy.

30.   The body needs sunlight to make vitamin D, and people with darker skin need more than paler-skinned people.