Im 45 and have never felt better.
I do a Ketogenic Diet. (http://reddit.com/r/keto
High Fat, Low Carb.
I eat well. - lots of butter, cream, etc.
Since starting, My blood pressure is down. My weight is down (I have lost over 40 kilograms in 12 months), my diabetes is gone. I sleep better, have more energy, and have never felt better.
No gastric reflux any more and the Irritable bowel syndrome? gone.
Gout is reduced massively (minor pain, but no attacks in 12 months)
I tell you that this is the best diet ever. especially if you love your meat and cream.