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Nutrition and Critical Thinking

Area of nutrition and critical thinking.

Please answer the following questions:

1)What is the difference between fat- and water-soluble vitamins?
2)What are antioxidants and phytochemicals?
3)What factors do you consider before taking dietary supplements?
4)What should be the role of government, if any, in influencing your dietary decisions?
5)What is Critical Thinking? How does Critical Thinking differ from non-critical thinking? For what can we use Critical Thinking?
6)What is perception? Is perception reality? Why or why not?

Solution Preview

1) One of the biggest differences between fat-soluble vitamins and water-soluble vitamins is that water-soluble vitamins are not stored in the body. Because the body is not able to store these vitamins, they must be constantly resupplied. As water soluble vitamins enter the body, they are put to work immediately and any excess is eliminated from the body via the urine. The vitamins that make up the water soluble category include the B vitamins, Vitamin C and Biotin. By contrast, fat-soluble vitamins, including vitamins A, D, E and K, are absorbed through the large intestines. For this absorption process to work properly, there must also be some dietary fat present. The body will find it difficult to complete the absorption process if fat is not eaten along with the fat soluble vitamins. Once fat soluble vitamins have been absorbed, they are stored in the liver where they wait until called upon to do their jobs.

2) Phytochemicals are plant chemicals that are neither vitamins nor minerals; yet, they have health-enhancing effects: phytochemicals help protect against cancer, cardiovascular disease and other diseases. Many phytochemicals are also antioxidants.
Antioxidants are chemical substances that donate an electron to the free radical and convert it to a harmless molecule. Antioxidants intercept free radicals and protect cells from the oxidative damage that leads to aging and disease. Antioxidants prevent injury to blood vessel membranes, helping to optimize blood flow to the heart and brain, defend against cancer-causing DNA damage, and help lower the risk of cardiovascular disease and dementia. Some antioxidants are ...

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