Word: excessive
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...differs from most other vitamins in a second important respect: too much of it is as bad as too little. Severe or long-term excess causes chalky calcium deposits in arteries, notably the aorta, and in the kidneys, with stone formation and loss of kidney function. Eventually, this can be fatal. To guard...
...more abundant supply of melanin, are in effect, perpetually tanned. Members of the white race are transparent-skinned in winter, when they must make the most of the limited ultraviolet avail able to synthesize vitamin D, but they take a tan in summer, when they might suffer from an excess. There are other bits of confirmatory evidence: the only relatively dark-skinned people in high latitudes are the Eskimos, who get all the vitamin D they need from fish-liver oils. Until the 1930s, when irradiation of milk to enrich its vitamin D content became prevalent, U.S. Negro children suffered...
...life. Babies of all races are lighter than adults, presumably reflecting nature's provision for early vitamin D needs. And people of all races have pale, unpigmented palms and soles. Since these parts have extra keratin and are not exposed to ultraviolet, they need no melanin protection against excess vitamin D synthesis...
...Womb at the Top." To abandon a foundering spacecraft, the astronaut dons extravehicular activity (EVA) gear, seals himself in the lifeboat and vents carbon dioxide and excess oxygen from his EVA suit to power the craft's attitude-control system. Face pressed against the porthole, he aligns his lifeboat with the horizon by firing the attitude-control jets. After sighting a landmark on earth with the reticle marked on the porthole, he aims and fires the retrorocket for 100 seconds, thus braking the lifeboat to a de-orbiting speed of 16,500 m.p.h. Then the retrorocket is jettisoned...
...Flying Paper Tigers"). It offers recipes for such dishes as "True Way to Marxist Contentment Soup," and "Sweet and Rotten Pork," all of which consist of rice, fish heads (if available) and radishes. If faithfully followed, the regimen is guaranteed to eliminate not only the dieter's excess flab but the dieter. Meanwhile, Red soldiers are cautioned to "report all fortune-cookie messages to the Security Officer." And so forth...