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Here you can insert text containing information on a subject, such as the importance of vitamins to human health. Tell learners here what are, what they do, and what are good sources of them.

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For example, ready-made retinol - which is the active form of - only comes from animal sources.

The main function of is to control the amount of calcium and phosphate in the body.

Good sources of are fruits and vegetables, but cooking destroys this vitamin.

Click each marker to reveal information.