I take a good multi-vitamin, flax seed oil, fish oil, glucosamine condroitant, vit E, & extra Vit C during winter months
I also take dong qui, black cohish, htp-5, ecchinacea, which are herbs.
And I'm only 29! I do feel much healthier though. I will say that this past week, my son was sick for 5 days, my dh for 5 days, my daughter for 2 and I felt sick with the flu (body aches, fever, sore throat), for about 4 hours. I popped vit c every hour for a few hours when I started feeling sick, and my immunity built itself back up quickly!