I do have a couple of genie bras for when I want light support. I do not know if it will help with creases though.
I don't wear a bra to bed, either.
I think the chest creasing mostly applies to women with large breasts (breasts heavy enough to create folds on the chest when side sleeping?). I'm a 36C now, but was a 36D while on HRT and I did get them. Baltic Collagen prevented them. As a 36D, I woke up without them when applying BC to my chest nightly.
I think it works on the chest the same as it works on the face. It plumps up and firms the skin, and the skin over the breast bone (which becomes quite thin as we age) benefits. I wake up with no pillow creases on my face, either.
I would imagine you could try retinol there, too. Also, didn´t someone (Tupelo?) tell us she used mandelic acid there?
I used mandelic acid for brown spots on my chest. Worked like a charm.
