TNCBio supports the demand for a chemically defined and fully animal component free replacement for FBS by presenting XerumFreeâ„¢, an efficient and fully defined cell culture supplement for serum free cell culture. The composition of XerumFreeâ„¢ is guaranteed free from any product derived from animal or human material. XerumFreeâ„¢ has an ultra-low protein content. The proteins in XerumFreeâ„¢ are from recombinant source only and these proteins are produced by a recombinant bacterial process in ACF media.