Science Project:

Does Cooking Food Destroy Its Potential Vitamin Levels?

3.9 based on 128 ratings

Research Questions:

  • What role does Vitamin C play in the human body?
  • What happens if a person has a deficiency of Vitamin C?

When one thinks of vitamin C, pictures of oranges usually come to mind. That's because vitamin C is highly abundant in citrus fruits such as oranges, lemons, limes, and grapefruits.

Vitamin C is an ascorbic acid. Without it, organisms will not be able to function correctly. It allows essential metabolic reactions to be carried out in the body, which in turns, allows the organism to live healthily.

Materials:

  • Citrus fruits- Oranges, Lemons, Limes, Grapefruits
  • Cornstarch
  • Iodine
  • Water
  • Beaker (if you are going to use a burner); Pot (if you are going to use a stove)
  • Bunsen Burner (or a stove)
  • Eyedropper/pipette
  • Several test tubes w/ rack
  • A white piece of paper
  • Pen and paper for notes

Procedure

Preparing the Iodine Indicator

  1. Mix cornstarch (1 tbsp) and water together to make a paste.
  2. Add 250ml of water and boil for about 5 minutes.
  3. Using a dropper or a pipette, add 10 drops of the boiled solution to 75ml of water.
  4. Add iodine to the mixture until it turns a dark-purple color.

Comparing Vitamin C Levels

  1. Squeeze the juice out of your chosen citrus fruit into 2 separate containers. One container will be marked “heated” and the other “raw”.
  2. Heat the one who is mark “heated” until it boils.
  3. With rubber gloves, carefully remove it from heat.
  4. With a dropper, add 5ml of the iodine indicator solution to a standard 15ml test tube. Using a clean dropper (to prevent contamination), add 10 drops of the cooked juice into the test tube.
  5. Clean the dropper and do the above for the “raw” juice sample.
  6. Compare which one turns a darker color. The darker color means there is less Vitamin C present in that particular sample.

Terms/Concepts: Vitamin C; Metabolic function; Heat; Cooking; Necessary functions of organisms

References:

http://www.webmd.com/diet/guide/the-benefits-of-vitamin-c

Pauling, Linus(1976).Vitamin C, the Common Cold, and the Flu. W H Freeman & Co.ISBN0716703610.OCLC2388395.

Author: Sofia PC
Disclaimer and Safety Precautions

Education.com provides the Science Fair Project Ideas for informational purposes only. Education.com does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against Education.com that arise thereof. In addition, your access to Education.com's website and Science Fair Project Ideas is covered by Education.com's Privacy Policy and site Terms of Use, which include limitations on Education.com's liability.

Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.

How likely are you to recommend Education.com to your friends and colleagues?

Not at all likely
Extremely likely