I was trying to reply to you yesterday, but nc.com wasn't cooperating.
I have fine, highlighted hair. I would recommend protein - I swear by weekly gelatin PTs (using IAgirl's recipe, link below). Protein can help reduce frizz. Protein has made ALL the difference for me in helping hold my 2c curls all day long, keeping frizz at bay, and adding shine. I do the weekly gelatin PTs and I also use some products that contain protein.