Colour plays a crucial role in human expression and existence through its presence in food, textiles, cosmetics and other industries. Synthetic petroleum-based pigments were initially well-received but are currently out of favour due to their non-renewable nature and the push for sustainable options. Among natural reservoirs of pigments, microbial sources are desirable for their rich genetic and chemical diversity. Filamentous fungi are particular useful for colour production. Numerous fungal species isolated from diverse habitats produce bioactive pigments such as melanin, polyketides, azaphilones and carotenoids, which can provide protection against environmental stressors while exhibiting a diverse range of hues. Fungi can generate pigments with potential applications in food, textiles, paints, agriculture, and medicine. This review evaluates the patent landscape for fungal pigments from 2004 to 2024 across fields including food, beverages, cosmetics, and pharmaceuticals. It also discusses global market trends for natural and microbial pigments, and examines factors slowing their commercialization such as mycotoxin co-production, downstream challenges, and regulatory hurdles. The review highlights the untapped potential of fungal pigments as sustainable options, the need to intensify efforts to overcome commercialization barriers and meet growing demand for eco-friendly alternatives.
Kaur et al. (Mon,) studied this question.