Jeff Duyvesteijn
Founder & CEO
For Youth
Jeff is the founder of For Youth, a Singapore-based longevity company established in 2021, focused on evidence-based nutritional strategies to support cellular health and long-term performance. Prior to founding For Youth, he spent a decade leading e-commerce for premium denim brand G-Star, where he was responsible for driving digital growth across multiple markets. His background combines brand building, direct-to-consumer strategy and performance marketing at scale. Today, Jeff works at the intersection of longevity science, consumer behaviour and modern commerce, developing products and systems designed to help people remain capable, sharp and physically resilient for longer.