Asking All Post-Ops & Other "Supplement *kitten*"

Options
I am four months out from Gastric Bypass surgery and as of now I am taking:

-Multivitamins
-Calcium Plus D
-Fiber
-B12
-Folic Acid
-Iron
-Biotin
-Melatonin

Are there any other supplements your doctor has suggested you take, or that you take on a regular basis for a specific reason? I figure if I am going to have to fill a pill case I might as well go all out and get all the nutrients I can in pill form! I am especially looking for vitamins that help with skin elasticity(I do take skin hair and nails), and sleep as I have a very difficult time sleeping. Any (respectful) suggestions are appreciated.