Caffeine is a sativa-dominant hybrid cannabis strain, known for its invigorating effects. It's a cross between Northern Lights and Columbian Gold. Some sources also associate the strain with a lineage of Lemon Sherb and Sirius Chem D. Caffeine is known for its uplifting and energetic effects, designed to mimic the stimulating properties of its namesake. Users report feelings of mental clarity, focus, and creativity.