For example, if you have $10m but never go to the doctor, you won't benefit from the medical care discrepancy between wealthy and poor
Eating right, exercise, supplementation of the things I am missing from my diet, clean air, avoiding chronic stressful situations and people are the only things I have found to benefit me. But that's just my own anecdotal experience. (n=1)
1. Less stress, better rest from better living conditions, that are quiet and have superb clean air and delegating stressful things to others
2. Waay better food
3. Comfortable stress-free vacations
4. Personal trainers, personal massages, spas, you name it
Etc, etc, etc.
If you have the wealth, but don't use it, you won't benefit from it. No shot!
Better food, comes first
Now, I'll grant that there are plenty of poor people who are drinking soda and eating junk food. Not going to deny that. But I have always been able to go to Walmart and buy lettuce and tomatoes for my salads, and I've never seen the price of those basics skyrocket like the price of eggs (at one point) or meat have. So the poor people who are drinking soda instead of water, and eating chips instead of salads? They're choosing those foods, not being forced into them by poverty.
There are plenty of areas where rich people have a big advantage over poor people in terms of access to things that provide longevity. But food, at least in America (the only country whose food prices I'm familiar enough with to talk intelligently about), just isn't one of them.
Now, you could argue that poor people didn't grow up with parents who taught them how to cook healthy food on a tight budget. Yes, that's true for many (not all) of the poor (again, at least in America, I don't know enough about other countries here). But there, it's not being poor that's keeping them from eating healthy, it's not being taught. Money isn't the limiting factor there.