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This study investigated the suitability of <i>Penicillium maximae</i> biomass powder and protein isolate as a food product or food ingredient. The biomass powder is rich in proteins (34.8%) and insoluble fiber (36.2%) but poor in lipids (3.1%). Strong water hydration (8.3 g/g, 8.5 g/g) and oil holding (6.9 g/g, 16.3 g/g) capacity were observed in the biomass powder and protein isolate, respectively, besides 100% emulsion stability, indicating multiple applications in the food industry. No locomotor impairment was induced in <i>Drosophila melanogaster</i> flies after consuming extracts of <i>P. maximae</i> biomass powder. Furthermore, decreased production of reactive oxygen species and preservation of survival, viability, and fertility parameters were observed in the nematode <i>Caenorhabditis elegans</i>, which reinforces the potential of <i>P. maximae</i> biomass for human and animal consumption. Together, the results show the vast food applicability of <i>P. maximae</i> biomass and protein isolate as protein substitutes with several health and environmental benefits.