Does fresh-squeezed orange juice have more vitamin C than the bottled kind? Heat and processing break down vitamin C (also called ascorbic acid). The juice on the shelf may contain far less than the juice you squeeze yourself. You use a vitamin C indicator solution that starts blue. You add drops of orange juice one at a time until the blue color disappears. Fewer drops means more vitamin C. You test four types of orange juice: - fresh-squeezed - bottled - frozen - canned Each type gets tested three times. Compare the average drop counts. The type needing the fewest drops has the highest vitamin C.