5. There are generally two different kinds of vitamins, they are __________________________.
6. Night blindness is a disease normally caused by lack of _____________.
7. One of the main function of vitamin D is to prevent adults from ________________.
8. Although the human body produces vitamin D normally, it fails to do so if there is not enough ______________.
9. The reason why vitamin C is seen as an antioxidant is that it drives ___________ out of the body.
10. If you are in lack of B group vitamins, you should turn to ________________________.
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