桔子与桔汁 谁对健康更有益？

Many health advocates advise people to eat an orange and drink water rather than opt¹ for a serving of sugary juice. But in ACS' Journal of Agricultural and Food Chemistry, scientists report that the picture is not clear-cut. Although juice is indeed high in sugar, the scientists found that certain nutrients² in orange juice might be easier for the body to absorb than when a person consumes them from unprocessed fruit. Ralf Schweiggert, Julian Aschoff and colleagues note that oranges are packed with nutrients such as carotenoids and flavonoids that, among other benefits, can potentially help lower a person's risk for certain cancers and cardiovascular disease. But many people prefer to drink a glass of orange juice rather than eat the fruit. Sugar content aside, are they getting the same nutritional³ benefits? Schweiggert's team set out to answer that question.   The researchers found that the production of pasteurized orange juice slightly lowered the levels of carotenoids and vitamin C. But at the same time, it significantly improved the carotenoid and vitamin C bioaccessibility -- or how much the body can absorb and use. And contrary to conventional wisdom, although juicing oranges dramatically cut flavonoid levels, the remaining ones were much more bioaccessible than those in orange segments.