Leapfrog THE DUO is a curated supplement bundle from the UK's first lactoferrin brand — two Leapfrog products paired for day-to-night support across immune defence, sleep, stress, and cognitive performance. Choose the combination that fits your life. All four Leapfrog supplements are built around lactoferrin — a natural protein found in mother's milk and one of the most studied immune proteins in science, with more than 1100 peer-reviewed papers documenting its antiviral, antibacterial, anti-inflammatory, and neuroprotective properties. Each product adds a targeted second layer to lactoferrin's foundational immune action: SNOOZE adds Lactium® 150mg for cortisol reduction and deeper sleep; FOCUS adds Lactium® 50mg, L-Theanine and Vitamin B12 for calm cognitive clarity; IMMUNE adds Zinc and Vitamin C for acute immune defence at 250mg lactoferrin. THE DUO is the most popular way for new customers to discover the Leapfrog range — two products, one discounted bundle, covering the health challenges most likely to be affecting you right now. IMMUNE + SNOOZE — day-to-night immune and sleep support. Stop the cold during the day and restore deep sleep at night. The original Leapfrog combination, loved by families. IMMUNE + FOCUS — immune resilience and cognitive clarity. For professionals, parents, and anyone who cannot afford to be ill or foggy-headed. SNOOZE + FOCUS — stress, sleep and mental performance. Calm the nervous system by day with FOCUS and restore deep sleep by night with SNOOZE. No pills to swallow. No water needed. All Leapfrog tablets are chewable, absorbed through the mouth for fast action, and made in the UK from lactoferrin at greater than 95% purity, sourced from a B Corp-certified dairy cooperative in France.