Vitamin c, also known as ascorbic acid, is a water-soluble vitamin.

维他命c，又名抗坏血酸，是一种水溶性维生素。

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Vitamin C is a water-soluble vitamin that is essential for the overall normal growth and development of the body.

维生素c是一种水溶性维生素，对身体的正常增长和身体发育必不可少的。

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Also known as tocopherol or produced in the pregnant phenol, is a fat-soluble vitamin, is one of the most important antioxidant.

又名生育酚或产妊酚，是一种脂溶性维生素，是最主要的抗氧化剂之一。

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Vitamin D is a fat soluble vitamin that is mainly produced by exposure of the skin to ultraviolet light.

CNN: How much vitamin D do I need?

Vitamin D is a fat-soluble vitamin that occurs naturally in a limited number of foods, so fortified foods including milk, margarines and breakfast cereals and dietary supplements are the major source for most Americans.

CNN: How much vitamin D should someone over 55 take?

Beta carotene is a type of carotenoid, a plant pigment that is a provitamin for vitamin A. During its digestion and metabolism, a percentage is converted to vitamin A, a fat-soluble vitamin that is important for vision, growth and development, and healthy immune and reproductive function.

CNN: Should I take beta carotene as a supplement?