[sushiman]

My sister sent be a big box from NY ( to Japan ) at my request a few years ago . I’ve taken them only a few times , though . Always worked for me . I wonder how long they are still good past the expiration date ? Mine expired 2 years ago !

[yelostar]

They probably take a while to lose effectiveness or potency. I don’t have any that are expired, but if so I’d make sure they looked normal and fizzed normally in the glass. Then I’d take a sip. If all is well, then down the hatch!