Vitamin C in Nutritional Supplements and Candy
Under the Japanese nutritional information display system for processed foods, it is essential to display the energy, protein, fat, sugar, and salt content. The display of nutritional components such as vitamins and minerals is also permitted.
The analysis of vitamin C by UV-VIS spectrophotometer is shown below.
Vitamin C is often added to foods as an antioxidant and for nutritional enhancement. Consequently, it is compulsory to display the vitamin C content per 100 g of food as a major nutritional component. There are several analytical methods for vitamin C, including titration; however, the hydrazine colorimetric method is often used, due to its broad scope of application.