Journal
MOLECULES
Volume 26, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/molecules26237125
Keywords
natural food additive; antioxidant activity; lycopene; food pigment; carotenes
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This study reviews the use of red tomato products as natural food colorants to replace synthetic dyes in the food industry, highlighting the potential of tomatoes as a natural alternative. However, further research is needed, especially on the stability of carotenoids in processed foods using tomatoes.
Most dyes used in the food industry are synthetic and can be a health hazard. Red tomato may serve as a natural alternative dye to replace synthetic colorants. This study aimed to review the literature on the addition of red tomato products (powder tomato, paste, freeze-dried, tomato peel powder, tomato pomace) to reduce the usage of synthetic dyes in the food industry. Red tomato products have been used as coloring in pasta, bologna, sausages, cookies, crackers, macaroons, hamburgers, breads, muffins, cheeses, and nuggets. The trans-cis isomerization of lycopene by oxidative processes directly affects the color of the pigment. The lycopene contained in tomato has antioxidant activity and could reduce or eliminate other oxidants and/or synthetic preservatives in food. Moreover, tomatoes in foods have high sensory scores, nutritional appeal, and marketing potential. However, its use as a food colorant has been not extensively explored. Therefore, further studies are still required, especially on the stability of carotenoids in tomatoes used in processed foods.
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