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How to choose fresh vegetables

2010-7-16

The nutritional value of many fruits and vegetables will change with the seasons change significantly. For example, in July to buy tomatoes, per 100 grams of edible portion of the vitamin C content, is January 2 times; cucumber in the summer of vitamin C content, it is also about 2 times in winter; carrot β-carotene content in , in June when 1.5 times the depth of winter.

Spinach, is the largest value of a seasonal vegetable, winter spinach listed on its nutritional value than the 5 October listed the spinach to 8 times higher. Spinach and other vegetables listed in the winter because the winter is not very strong sunlight, its contained those nutrients with photosynthesis-related will be gradually increased. Into the summer, the water contained significantly increased, while the solid will be reduced by about half of the nutrients.

With a vegetable, edible part because of different colors and different shades of differences in growth period, their nutritional composition and content are different. If the light green part of green onions nutritional content than slap on some much higher, very light blue parts of vitamin A, vitamin B, and vitamin C content of less than half the light green part. With a celery, dark green leaves of celery than the light green stems and stalks contain more vitamin A and vitamin c. There are cabbage, its leaves than the stem part of the nutritional content of vegetables high. However, we often need for cooking, only a portion of access to vegetables.

1, to avoid the "finishing", for example, we will Chinese cabbage, cabbage outer leaves discarded, but the vitamin C content than the "Heart Department" several times higher than ten times, we are used to discard the celery leaves vitamin C content than the stem above the 7 to 15. They dropped significantly reduced the body's vitamin intake.
2, not only access to nutritious part of the right, because the human body is a need "comprehensive" nutrition, and simply eat any vegetables or vegetables a site can not meet this requirement, so no part of vegetables Do not be thrown away.

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