AnthoPLUS produces anthocyanins, of varying complexity in side chain decoration, or labelled with stable isotopes as fine chemicals. These can be used for assaying the composition of feedstocks for natural colours, for bioavailability, bioefficacy and mechanistic research in experimental medicine and as standards for assaying natural colorant extracts for improved formulations. We make use of a robust new tissue culture system that develops the potential of plant cells as green factories for the stable production of natural plant products. Production of these compounds spans the whole value-chain from synthesis, scale-up, preparative purification, assessment of toxicity and bioactivities to distribution for sales. AnthoPLUS is supported by the ERA-NET Industrial Biotechnology 4th Joint Call, funded by their respective national and regional agencies.