Microbial bacterioruberin: The new C50 carotenoid player in food industries
Résumé
The demand for natural products has significantly increased, driving interest in carotenoids as bioactive compounds
for both human and animal consumption. Carotenoids, natural pigments with several biological properties,
like antioxidant and antimicrobial, are increasingly preferred over synthetic colorants by the consumers
(chemophobia). The global carotenoid market is projected to reach US$ 2.45 billion by 2034, driven by consumer
preferences for natural ingredients and regulatory restrictions on synthetic products. Among carotenoids, bacterioruberin
(BR), a C50 carotenoid naturally found in microbial hyperhalophilic archaea and in moderate
halophilic archaea, stands out for its exceptional antioxidant capabilities, surpassing even well-known carotenoids
like astaxanthin. BR’s and its derivatives unique structure, with 13 conjugated double bonds and four -OH
groups, contributes to its potent antioxidant activity and potential applications in food, feed, supplements,
pharmaceuticals, and cosmeceuticals. This review explores BR’s chemical and biological properties, upstream
and downstream technologies, analytical techniques, market applications, and prospects in the colorants industry.
While BR is not intended to replace existing carotenoids, its inclusion enriches the range of natural
products available to meet the rising demand for natural alternatives. Furthermore, BR’s promising antioxidant
capacity positions it as a key player in the future carotenoid market, offering diverse industries a natural and
potent alternative for several applications.