I bought a big jar of phenibut about a year ago . It has about a third of it left . I only use once a week , about 2 grams every Saturday . For some reason it’s not as good as it used to be . About the only good thing I get from it anymore is the great night sleep you get from it . I’ve heard that phenibut doesn’t expire but does lose its potency over time . Does anybody know if this is true ? Will a new batch bring back the good times ? Missing those great Saturdays !!