Microbial populations in probiotic supplements in China were investigated using the plate count method and PCR–DGGE technique. Our results indicated that total viable cells in most probiotic products could meet the minimum requirement of the Chinese National Standards (106 CFU/mL); however, total viable cell counts of the species detected in the probiotic products did not correspond with the cell number given in the label.
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Chen et al. (2016) studied this question.
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