You're no different at 35 than you were at 34. What worked then, should work now. The reason I say that is everyone's different so, if you've kept on top of things, you already know what's been working for you.
You need to train smarter, not because you're older, but (assuming you're a serious trainer) closer to your own limits. All the tried and true supplements are as true for people in their 20's as well as 50's (protein, omega's and other joint stuff, creatine, etc).
Other than real diseases like cancer the biggest thing to watch is your natural test, BP, and cholesterol, get them checked now and again