I'm sorry, I don't know the answer to this though there must be some way to tell. I've read about other women taking supplements to try to improve their egg quality, so unless they're doing it blindly because they think it can only help, I would think there is some way to find out.
I suggest you try asking this on the TTC over 35 board. The ladies there are EXTREMELY educated about this kind of thing and I found them very helpful. Good luck!