Explain how Vitamin E functions in the body when polyunsaturated fat intake increases in an individual?

Please answer following questions in completed sentences:

1.            Explain how Vitamin E functions in the body when polyunsaturated fat intake increases in an individual?

2.            What is made in the stomach without which someone could develop deficiency symptoms for vitamin B12? Explain.

3.            What has been responsible for the almost 30 percent drop in the national incidence of neural tube defects? Explain.

4.            Is it possible for a person consuming adequate amounts of milk and egg sources of protein to be deficient in niacin? Why or why not? [Fact to include in your answer “tryptophan is converted to niacin in the body”].

5.            What vitamin is given to all newborn infants to keep them from bleeding uncontrollably? Explain.