I'm 40 this year and having babies has done a number on my skin- I've aged so much in the past year and it's showing on my face especially- large pores, fine lines getting deeper, etc. My already very fine hair has also become much finer. I've heard people waxing lyrical about collagen supplements. Is there one that is better than others? Has anyone got any recommendations for something they've used and it having a positive effect on their skin and hair?