Vitamins Quiz and Flashcards: Define & Classify

Study Notes

Definition and Function

A vitamin is a type of nutrient that is required in small amounts for various bodily functions.
Vitamins are organic compounds that cannot be produced by the human body and must be obtained through the diet or supplements.

Classification

Vitamins can be classified into two main categories:
- Fat-soluble vitamins: A, D, E, and K
- Water-soluble vitamins: B and C

Fat-Soluble Vitamins

Vitamin A:
- Important for vision, immune function, and skin health
- Food sources: sweet potatoes, carrots, dark leafy greens, and liver
Vitamin D:
- Essential for bone health and immune function
- Food sources: fatty fish, fortified dairy products, and sunlight exposure
Vitamin E:
- Acts as an antioxidant, protecting cells from damage
- Food sources: nuts, seeds, and vegetable oils
Vitamin K:
- Necessary for blood clotting and bone health
- Food sources: leafy greens, such as spinach and kale, and fermented foods

Water-Soluble Vitamins

Vitamin B:
- Complex of several B vitamins, including thiamin, riboflavin, and niacin
- Important for energy metabolism and nerve function
- Food sources: whole grains, lean meats, and fish
Vitamin C:
- Important for immune function and collagen production
- Food sources: citrus fruits, strawberries, and bell peppers

Deficiency and Toxicity

Vitamin deficiency can occur due to inadequate diet, malabsorption, or increased demand.
Vitamin toxicity can occur due to excessive intake of fat-soluble vitamins, leading to adverse health effects.

Recommended Dietary Allowance (RDA)

The RDA is the daily intake of vitamins and other nutrients that meets the nutritional needs of 97-98% of healthy individuals.
RDAs vary by age, sex, and other factors, and are used to guide dietary recommendations.

Description

Test your knowledge of vitamins, their functions, classification, and recommended dietary allowance. Learn about the different types of vitamins, their sources, and the effects of deficiency and toxicity.