Natural pigments are a class of important ingredients widely used in food,pharmaceutical and cosmetic applications.However,the stability of natural pigments has been a key issue restricting their applications.This paper reviews the research progress on the stability of natural pigments.First,the sources and classifications of natural pigments are introduced.Then,the factors affecting the stability of natural pigments,including temperature,pH,and metal ions,are discussed.Following that,the commonly used methods to improve the stability of natural pigments,such as microencapsulation,composite embedding and irradiation,are summarized.Finally,future directions for natural pigment stability research are envisioned,including exploring the diversity of their use for innovative and industrial solutions.The findings of this paper are relevant for identifying current problems in natural pigment stability and promoting the use in food and other applications.
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