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Ch 9: How Vitamins Support Nutrition

About This Chapter

Watch online video lessons to learn about water and fat soluble vitamins, supplements, sources of vitamins and much more. Each lesson is accompanied by a short multiple-choice quiz you can use to check your understanding of these nutrition topics.

How Vitamins Support Nutrition - Chapter Summary

Vitamins' role in maintaining the health of our bodies is the topic of this chapter. These lessons show you how vitamins are classified and outline the health effects of thiamine, riboflavin, B12 and vitamin A, among others. Nutrition professionals also introduce you to symptoms of vitamin deficiency and toxicity and help you identify food sources of vitamins. At the end of this chapter you'll be familiar with:

  • Fat-soluble vitamins
  • Water-soluble vitamins
  • Vitamin toxicity
  • Vitamin deficiency

Each lesson in this chapter contains a short, self-paced video as well as a transcript that features key terms in bold. Plus, you can check your understanding of the lesson topics at any point during your studies with multiple-choice lesson quizzes and a chapter test. Responses link back to the corresponding video content, allowing you to shore up any areas requiring some additional study time.

13 Lessons in Chapter 9: How Vitamins Support Nutrition
Vitamins We Need: Their Importance & Sources

1. Vitamins We Need: Their Importance & Sources

There are a lot of different vitamins, and they come from many different places! This lesson will teach you about what they are, how many different kinds you need, what they do, and where you can obtain them naturally.

Classification of Vitamins: Water-soluble & Fat-soluble

2. Classification of Vitamins: Water-soluble & Fat-soluble

Vitamins are classified based on their solubility. The fat-soluble vitamins are A, D, E and K. They can be stored in the body. The water-soluble vitamins are the B-complex vitamins and vitamin C. They are easily flushed out of the body.

Vitamin C: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

3. Vitamin C: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

Vitamin C is soluble in water, so it is easily flushed out of your body. If it is not replenished regularly, it can cause deficiency symptoms, such as scurvy and a reduced ability to fight infection. Toxicity is rare, but can cause GI distress.

Thiamin: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

4. Thiamin: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

Thiamin (B1) is a water-soluble vitamin that is easily flushed out of the body. If the level of thiamin in the body is too low, it will result in a deficiency disease, such as beriberi or Wernicke-Korsakoff syndrome. There's no toxic level of thiamin.

Riboflavin: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

5. Riboflavin: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

Riboflavin is a water-soluble vitamin, so it is not stored in the body. In this lesson, learn about this vitamin and its effects on the body, including symptoms of too much or too little riboflavin.

Niacin, B5, B6 & B7: Water-Soluble Vitamin Deficiency & Toxicity

6. Niacin, B5, B6 & B7: Water-Soluble Vitamin Deficiency & Toxicity

Water-soluble vitamins, which include niacin, B5, B6 and B7, are easily flushed from the body, making them prone to deficiencies. Learn about these B vitamins and symptoms associated with consuming too few as well as too many of them.

Folate: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

7. Folate: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

Folate, also known as B9, is found naturally in green leafy vegetables and other foods or obtained through folic acid, which is an easily absorbed form of folate. Learn about folate deficiency symptoms, such as neural tube defects, and toxicity symptoms in this lesson.

B12: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

8. B12: Water-Soluble Vitamin Deficiency & Toxicity Symptoms

Vitamin B12 (cobalamin) is a water-soluble vitamin found naturally in animal products, but also available in fortified plant foods. Learn how pernicious anemia and atrophic gastritis impact B12 absorption and the symptoms of deficiency and toxicity.

Vitamin A: Fat-Soluble Vitamin Deficiency and Toxicity Symptoms

9. Vitamin A: Fat-Soluble Vitamin Deficiency and Toxicity Symptoms

Vitamin A is a fat-soluble vitamin that is important for vision and cell differentiation. Learn about conditions that can result when vitamin A is deficient, including night blindness and xerophthalmia, as well as symptoms of toxicity, in this lesson.

Vitamin D: Fat-Soluble Vitamin Deficiency & Toxicity Symptoms

10. Vitamin D: Fat-Soluble Vitamin Deficiency & Toxicity Symptoms

Vitamin D is a fat-soluble vitamin that is made by your body when your skin is exposed to the sun. It is also obtained through foods. Learn about conditions that result due to vitamin D deficiency, such as rickets and osteomalacia, as well as symptoms of toxicity.

Vitamin E: Fat-Soluble Vitamin Deficiency & Toxicity Symptoms

11. Vitamin E: Fat-Soluble Vitamin Deficiency & Toxicity Symptoms

Vitamin E is a fat-soluble vitamin that acts as an antioxidant. Vitamin E deficiency can cause cell membranes to break down and lead to hemolytic anemia. Learn why this is a problem for premature infants, and also learn about symptoms of toxicity, in this lesson.

Vitamin K: Fat-Soluble Vitamin Deficiency & Toxicity Symptoms

12. Vitamin K: Fat-Soluble Vitamin Deficiency & Toxicity Symptoms

Vitamin K is a vitamin needed for blood clotting and bone health. Learn why bleeding and bruising increase in a person with a vitamin K deficiency and why deficiency can increase risk of osteoporosis. Also learn about risks involving overconsumption.

Vitamin Supplements: Benefits & Risks

13. Vitamin Supplements: Benefits & Risks

Vitamin supplements are intended to add nutritional value to your diet. Learn about groups of people who may benefit from taking vitamin supplements and the possible risks involved when dietary supplements are added to your diet in this lesson.

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