Aging Why do some people do it better than others?

Recently I have been noticing that some people just don't seem to be aging as fast as others. Now that I'm fifty this is something that I am paying a lot of attention to. The other day I went to a Real Estate mini convention. I have been in this business for 25 years now. So over time I have gotten to know a lot of Realtors. When I was at this mini convention I saw an agent that I have not seen is maybe 10 years. She looked better than when I saw her ten years before. I told her "you don't age"! She laughed at me. I asked her if there was something special that she was doing? Like being a vegetarian, or using a new face cream ect. She just laughed me off saying oh you know I drink and smoke all the time. Then she said no she doesn't smoke. I know smoking ages you and I know drinking is supposed to do the same. Could it be that simple? Just don't pollute your body? Now here's the really odd thing. The class that I took with Miss fountain of youth had a speaker. His name is Hal Becker. I have seen him 3 times over 25 years.He fought a really tough battle with stage four cancer. This guy is energy on steriods. Now usually when you fight a fight like that you look like you've been through a tough time. He looked great!! I sat there wondering what was it that Miss FY (fountain of Youth) and he had in common. They both had great looking skin, their hair wasn't thinning but vibrant! Miss FY had the body of a high school girl without looking sickly skinny. Hal was in great shape bubling with energy and fit as can be!I don't think it comes down to just good genes. The one photo at the top of this article is of a woman aging from 20-70 She is a doctor that believes in skin therapy and sells a product for that. I think it has something to do with diet and exercise. I'm going to bug Miss FY and find out if she works out and what her diet is like. I think I might bug Hal too. Does anybody have any ideas here?