My aunt's boyfriend passed away last year and had several vitamins and such 2. 2 of these are unopened, the other doesn't seem to have much missing. All have passed recommended best by date.
We don't like that they are covered with red 40 and I haven't ever been a big calcium consumer anyhow.
Friend thought about grinding them up to use for lizard powder. Not sure if that is a feasible option, would need to be researched thoroughly or ask an expert.
Not sure if you could use them in the garden.
I'm just throwing ideas out there. I don't see us coming up with any use for them, so I wanted to offer them, for whatever you might think they would be good for.