The field of insect mass rearing for food, feed, and biotechnology is advancing rapidly. Achieving efficient and sustainable production depends on a deep understanding of insect nutritional needs and how diet shapes their physiology. Recently, our research has expanded to explore how the gut mycobiome influences these nutritional interactions and contributes to insect performance. We study these processes using molecular, genetic, and biochemical approaches, aiming to generate insights that translate into innovative, scalable solutions for insect-based industries.