Overview on Annatto and Other Colours, Colour Removal, Analysis
1 Journal 2 Comprehensive Reviews in Food Science and Food Safety 3 Title 4 Colorants in cheese manufacture: Production, Chemistry, Interactions and Regulation 5 6 7 Authors 8 9 Sharma, P.1,2, Segat, A.1,2, Kelly, A. L.3, and Sheehan, J.J.1 10 11 1 Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland 12 2Dairy Processing Technology Centre (DPTC), Ireland 13 3School of Food and Nutritional Sciences, University College, Cork, Ireland 14 15 16 17 18 1 19 ABSTRACT 20 Colored Cheddar cheeses are prepared by adding an aqueous annatto extract (norbixin) to 21 cheese milk; however, a considerable proportion (~20%) of such colorant is transferred to 22 whey, which can limit the end use applications of whey products. Different geographical 23 regions have adopted various strategies for handling whey derived from colored cheeses 24 production. For example, in the USA, whey products are treated with oxidizing agents such 25 as hydrogen peroxide and benzoyl peroxide to obtain white and colorless spray-dried 26 products; however, chemical bleaching of whey is prohibited in Europe and China. 27 Fundamental studies have focused on understanding the interactions between colorants 28 molecules and various components of cheese. In addition, the selective delivery of colorants 29 to the cheese curd through approaches such as encapsulated norbixin and micro-capsules of 30 bixin or use of alternative colorants, including fat- soluble/emulsified versions of annatto or 31 beta-carotene, have been studied. This review provides a critical analysis of pertinent 32 scientific and patent literature pertaining to colorant delivery in cheese and various types of 33 colorant products on the market for cheese manufacture, and also considers interactions 34 between colorant molecules and cheese components; various strategies for elimination of 35 color transfer to whey during cheese manufacture are also discussed.
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