Man I have no idea honestly carlos, I assume in a dark bottle away from light and heat it should hold for about the same amount of time you could store good bud. With it being suspended in a solution away from oxygen and light there wouldn't be much oxidizing effect but it is just speculation on my part bro. I was about to say I have never made tinctures, that would be a lie. I have made some with pure grain alcohol but it was years ago, like 15 years. I am not up to date on any new processes though. Just trying to give people that may be interested options.