21.   Apples are also rich in pectin, which has been shown in some studies to lower blood cholesterol levels.

22.   As blood glucose levels soar, the body breaks down fats into fatty acids and uses the fatty acids instead of glucose for energy.

23.   As the blood insulin level rose, the hypothalamus slowed in lean subjects.

24.   At the hospital, he was put on insulin and his blood glucose levels were stabilized.

25.   Because olive oil lowers blood levels of damaging LDL cholesterol without lowering protective HDL cholesterol, it has acquired a reputation as a heart-healthy oil.

26.   Both body fat and inactivity can increase blood levels of estrogen.

27.   Both Type I and Type II patients must live by strict diets designed to help balance their blood glucose levels.

28.   A new study has found that vegetarians have high blood levels of salicylic acid, the active ingredient in aspirin.

29.   A pulse oximeter, which is clipped to a finger or toe, measures blood oxygen levels.

30.   A second change relates to the HIV blood level as measured by two tests.