What is the CFU Level? A Comprehensive Guide
                                
                                
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                                    4 min read                                
                            
                                CFU, or Colony-Forming Unit, is a standard metric used to estimate the number of viable microbial cells in a sample, accounting only for living cells capable of reproduction. This is crucial in fields ranging from probiotic production to environmental testing, where measuring living organisms is vital for safety and efficacy. A CFU level is not a direct cell count, but rather an estimate based on visible colonies grown under controlled lab conditions.