This product is a serum-free medium specifically designed for the in vitro culture of human embryonic stem cells, featuring an integrated HEPES buffering system. Its core formulation delivers exceptional pH stability in open-access culture environments—such as during incubator door openings—effectively safeguarding cellular health and maintaining high pluripotency levels. With clearly defined components and no animal-derived ingredients, this medium creates a more stable and reliable environment for long-term expansion, directed differentiation, and various cutting-edge studies of human embryonic stem cells, ensuring highly reproducible experimental results.