MicroHarvest reports strong pet palatability for MPX microbial protein

MicroHarvest, a biotechnology company based in Hamburg, Germany, has announced promising results from a recent study evaluating the palatability of its microbial protein, MPX, among cats and small dogs. The results suggest the ingredient could be a viable alternative protein source for pet food applications, with strong acceptance from both animals and their owners.

The study involved 60 companion animals – 30 cats and 30 small dogs – and compared standard commercial kibble with a modified version containing 10% MPX protein. The kibble was co-developed with a Portuguese animal nutrition partner by adapting an existing commercial formulation to include the alternative ingredient, while maintaining consistent nutritional targets and other key variables.

Results showed that 68% of cats selected the MPX-formulated kibble over the control product, and cats consumed an average of 37 grams of the MPX product compared to 25.3 grams of the standard kibble. Among small dogs, 58% chose the MPX formulation first, and dogs consumed 44% more of the MPX-based food on average. Additionally, 91% of dog owners and 73% of cat owners reported typical or higher consumption compared to their pets’ usual feeding behavior.

“These results mark a significant milestone for alternative proteins in the pet food industry,” said Ally Motta, Application Specialist at MicroHarvest. “Palatability is a non-negotiable factor, and the fact that both cats and dogs not only preferred MPX but consumed more of it proves that microbial protein can compete on taste – not just sustainability or nutrition.”

The MPX-based kibble used in the trial delivered 30% crude protein and 13% crude fat, placing it within the typical nutritional ranges for premium pet food products.

MicroHarvest produces its protein via a fermentation process that utilizes agricultural sidestreams, offering a lower-impact method of generating high-quality protein. While current applications focus on animal nutrition, the company is also exploring future uses in human food, citing growing global demand for sustainable protein sources.

This latest study supports the company’s continued development of microbial proteins as a scalable ingredient in pet food, with performance in palatability trials suggesting commercial potential beyond nutritional and environmental claims.