Vitamins & Suppliments for People Over 50+

Hey, I need information about vitamins and other supplements for people 50+. I want to get some good stuff for my mother and grandmother and there are many online brands that offer woman vitamins for 50+, but not real feedback on the quality. I was wondering if anyone could suggest anything. I suppose some fish oil too would be helpful. Obviously the only goal is a better health, nothing related to fitness or look. thanks