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Nutrition Science Fair Project

Ripening Oranges and Vitamin C

Ripening Oranges and Vitamin C | Science Fair Projects | STEM Projects
Ever wonder why oranges are so good for you? It's because they contain a lot of vitamin C, but did you know that the amount of vitamin C in oranges decreases as they ripen? In this project, you'll find out how the ripeness of an orange affects its vitamin C content.


The hypothesis is that the unripe orange will have the highest concentration of vitamin C.

Method & Materials

You will measure the amount of vitamin C in three oranges of different ripeness levels, and then compare the results.
You will need a ripe orange, a half ripe orange, an unripe orange, 3 beakers, a juice extractor, a burette, a bottle of iodine-starch solution, a glass stirring rod, a stand and holder to support the burette, and a measuring cylinder.


The results showed that the unripe orange had the most vitamin C, while the fully ripened orange had the lowest amount of vitamin C.

Why do this project?

This science project is interesting because it shows how the ripeness of an orange affects its vitamin C content, which is an important nutrient for our bodies.

Also Consider

Variations of this project could include using different types of fruits like papayas or apples, or repeating the experiment by leaving freshly squeezed juice in the open for a period of time to observe the gradual degradation of vitamin C.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

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