Today, millions of users know Noom as the most-installed weight loss app of 2020. But it took countless pivots and many years for the consumer-led digital health company to turn its mission—of helping people live healthier, happier lives—into a product users are obsessed with. Saeju's intense desire to help people dates back to childhood in South Korea, growing up in a family of doctors. He started working on what would become Noom in 2007, but it took nearly a decade for the company to hit its stride. Saeju shares why he's hyper-focused on preventative healthcare, why he would have been shocked as an early founder to learn he'd be in the weight loss business, and how becoming a father made him realize the value of his parents' unconditional love.