Читать книгу Food Chemistry. The Role of Additives, Preservatives and Adulteration онлайн

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They quickly fade when exposed to light and show low resistance to acidity and high temperature. For example, annatto turns to pink from yellow at low pH and chlorophyll turns to brown from green. This makes natural origin colorants more expensive. For example, natural red and yellow colorants may cost 100 times more than synthetic products with the same effect. Natural coloring matters are synthesized by plant and animal organisms or microorganisms and they naturally exist in them. The most notable colorants obtained from animal sources are Natural Sepia (Cuttle fish), Crimson (Kermes Lotus), and Tyrian purple (Murexshellfish).

We all need food to survive and to maintain our health and as the population is increasing day by day, demand for food is also increasing. In modern days, consumer wants good food with appropriate quality, taste, and safety. For these improvements and increasing demand of food, food additives are required in our daily food for good quality to fulfil the demands of consumers. Ingredients or substance that added in a food for processing, preserve, or storage is called food additives. Food additives are of little or no nutritive values and it includes food coloring agents, flavoring substance, and food preservatives. Food additives are also used for enhancing the taste and appearance.