I need opinions before I go to Sally's and drop $20

I'd taken biotin supplements and moisturize my hands regularly (because eczema) but that hasn't worked

take prenatals

Yes and it did absolutely nothing

CND RescueRX

that's the only one I ever used as an aesthetician that really made a difference I could notice

The big problem with getting your nails stronger, is it's something that has to happen from the nail bed up so before you can even like see the nail.