科学家已经发现了十二类维持机体健康必不可少的维生素，这些维生素需要在饮食中摄取。

There are twelve different types of Vitamins that have been officially recognized for being essential for good health, and that need to be incorporated into the diet.

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例如，如果您有刚分娩，有一个很好的变化，你的身体已经被耗尽的维生素需要的良好的头发生产。

For instance, if you have recently given birth, there is a good change that your body has been depleted of the vitamins it needs for good hair production.

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经过处理的食品为猫设计加上许多猫甚至获得一定的营养作用的维生素需要，并保持一个美丽的增加和。

The processed foodstuff designed for many cats plus cats are sure to obtain nutritional vitamins needed to be and keep a beautiful increase and even action.

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