FibroGRO-LS Medium is optimized for low-serum (2%) culture of human fibroblasts, and supports the growth of these cells in a 2% serum environment at rates equal to or greater than comparable media supplemented with much higher concentrations of FBS. May also be used for the culture of stromal cells, mesenchymal cells and mouse embryonic fibroblasts. FibroGRO-LS Medium contains no antimicrobials and no phenol red; components that can cause cell stress and “masking effects” that may influence experimental results (these are not needed, or recommended, to achieve optimal cell performance). FibroGRO provides a perfect cell system to establish low serum human feeder layers for stem cell culture, or as a model to study wound healing, toxicology or basic cell biology