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阅读材料 Vitamin D Hormone One of the vitamins necessary forgood health is Vitamin D. We get itfrom sunlight. Ultraviolet rays from thesun change a form of cholesterol in theskin into Vitamin D. We also can getVitamin D from some foods, such as milkor fish liver oil. Vitamin D increases the amount ofcalcium in our blood. Calcium is neededfor our nerve and muscle cells to worknormally. It also is needed to build strong 相似文献
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阅读材料 New Treatments of Kidney Stones American scientists say unusual newreatments developed by European doctorsshow great promise in fighting thepainful problem of kidney stone.Untilnow,doctors have had to operate to re-move the stones from a patient's body.But scientists are now using powerful so-and waves and shock waves todestroy kidney stones.Kidney stones aresharp hard objects that are formed by 相似文献
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Scientists say a new study shows thata person can lose weight more quickly ifhe waits until after eating to do somephysical activity such as walking or run-ning. Scientists have long known thatphysical activities like sports or walkinghelp persons to lose weight They makethe body burn up food and body fat forenergy. But a recent study from Cor-nell University in New York shows that 相似文献
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Heart disease kills more people inindustrial countries than any other disease.In the United States,the government istrying to save lives with a new programthat teaches people how they can helpprevent heart attacks and Strokes. Doctors already know that smokingand eating foods high in fat and saltgreatly increase the chance of developingheart disease.Lack of any exercise suchas running or walking also helps causeheart attacks and strokes. 相似文献