ageLOC® Y-Span: Nu Skin’s most advanced anti-aging supplement ever, ageLOC® Y-Span, is designed to promote your youth span—the years you can enjoy life being more active, energetic, and healthy. LifePak®: LifePak® provides a nutritional foundation for a life full of vitality and energy and free of debilitating conditions associated with nutritional deficiencies and low antioxidant levels.