Continuing our scientific study of what we need to eat to stay healthy (a balance of carbo-hydrates, proteins and vitamins), Y6 turned their investigative focus squarely on vitamins.
We used a blue liquid called indophenol which turns colourless when vitamin C is added. The more clear the liquid becomes, the more vitamin C is present. Unsurprisingly, when water was added, there was no change in the indophenol. When we added a dissolved vitamin C tablet, the indophenol instantly became transparent.
The interesting results came when we tested lime juice (the indophenol lost most of its colour) and when we compared cheap and expensive orange juice. Guess what? Cheap orange juice contains more vitamin C than a more expensive variant.