On this episode of WellBuilt, Jon sits down with Tero Isokauppila, founder of Four Sigmatic and co-founder of Hiro, for a conversation spanning functional mushrooms, mycelium-based diapers, and rethinking how we raise healthier, happier kids. Tero shares how his childhood on a Finnish family farm and his background in food science sparked a lifelong mission to bring functional mushrooms into mainstream culture. Four Sigmatic's mushroom coffee and adaptogen blends have reached millions, helping redefine daily rituals for better focus, energy, and wellbeing. We also dig into Hiro, the world's first diaper made with mycelium, designed to drastically reduce the environmental footprint of traditional diapers. Tero explains the science, the sustainability potential, and what it's like to enter a completely different consumer category. The conversation covers: 🍄 The early days of Four Sigmatic and the challenge of introducing functional mushrooms to a global audience. 🍼 How Hiro's mycelium technology could transform one of the most waste-heavy industries on the planet. 🌱 The parallels between growing a CPG food brand and a sustainable/environmental technology company. 👶 Tero's personal approach to healthy parenting, including nutrition, nature immersion, and setting the right environment for curiosity and resilience. 🌍 How Tero thinks about balancing global scale with local authenticity, and why certain ingredients should only be sourced from their native ecosystems. 🥗 The role of nutrient density in both adult and child diets, and why "food as information" should be a guiding principle. 🛠 Lessons from bootstrapping and self-funding early Four Sigmatic growth before bringing in outside capital. Tero and Four Sigmatic have been at the forefront of the functional mushroom movement. Tune in for an inside look at the health benefits, business lessons, and untapped potential of the fungi kingdom! 

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