Word: carotenoids
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Dates: during 1990-1999
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...similar process of educated-guess-and-error led people to load up on the nutritional supplement beta carotene in the early 1990s. Scientists noted that those who eat lots of fruits and vegetables tend to get less cancer and speculated that carotenoids--the same antioxidant substances that seem to protect against heart disease--were responsible. In particular, they focused on beta carotene, the most abundant and common carotenoid, as the most likely to prevent cancer...
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