You can't really tell just by the label since it depends on how the lab cut and sliced the protein. Generally though, any deep pentrating product has proteins of a smaller molecular size to help get through. Then there are lines like joico that make small molecular size one of their selling points.
To me, the real way I tell the difference in deep and regular conditioners is my hairs health over time. When I use deep conditioners on a regular basis, my hair help shows visble improvement. Regular conditioners imo just maintain things. This is why some people slack off with deep conditioning and don't really see any major harm done. They have built their baseline up and at that point, they are just maintaining it.
Okay, thanks. Hmm, maybe I will try this joico and see if it makes a difference. I'll try it several weeks in a row and see if I can notice any difference. thanks.