Keep refrigerated and the shelflife should be 6 to 12 months! Shelflife varies depending on how many times it is gotten out and exposed to the air. It will stink or turn black when it goes bad. Please always research before starting any new herbs especially if you are pregnant, nursing, on any prescription medications or have any diagnosed conditions. and yes, I did use lemons, they just look orange because of the filter 😞 #coughsyrup #syrup #diy #cough #cold #breathe #throat