‘Mfg’ stands for the manufacturing date. Previously, USP guidelines required supplement manufacturers to state an expiration date, ‘Best before’, ‘Use by’ or ‘Sell by’, date. The guidelines were revised by the FDA to include an ‘mfg’ date as well. All manufacturers following the FDA’s GMPs will have an mfg date mentioned on the product itself. The mfg date is an indicator of the date when the product was manufactured. To better understand the mfg meaning consider a product with “MFG 091219”. It means that the product was manufactured on September 12, 2019. Usually, supplements must be consumed within 2 years of the mentioned mfg. This general guideline is different for probiotics that need to be consumed within a year or 18 months of being manufactured.   * These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.