VitaminºC is a female-led climate venture fund that requires every investment to mitigate at least 100,000 tons of CO₂ or improve resilience for 100,000 people annually within five years, making impact a hard screening criterion rather than a nice-to-have. The fund operates as a trans-Atlantic bridge between Zurich and San Francisco, moving European climate deeptech to US markets while helping US founders access European policy stability and talent, and uses blended capital structures combining venture funding with philanthropy to support scientific evidence generation.