Do pheromone bottles from 2011 go bad, or can I still use them?

Just a quick question. I purchased phero spray bottles from 2011, and still have a good amount left in them. I know cologne goes bad in 3 years, but what about pheros? Are they all wasted or can I still use them? This goes for oil pheros too.

If they have been kept in the shade/dark and not evaporated then they should be fine.

There amy be a slight discolouring but so long as they don’t smell sour/sweaty then yo should be ok.

I’ve still got Pheros from 2009 that are still usable and although oils may go-off faster, its only ever happened a couple of times and not any AD products.