Does better grades and higher class rank make life healthier? Yes.
There has been a research on 10,317 students at the Wisconsin Longitudinal Study. In this study, researchers found information where it shows that better grades do lead to a healthier life.
Of course, there are other reasons to consider getting good grades. For instance, better education leads to a good job. A good job leads to more money and that could lead to a better living. You can get a big house in a nice neighborhood. You will also get a chance to get fresher and healthier foods for yourself. Educated people also can have healthier and longer lives. They will know what's right and what's wrong. Should you smoke? Should you drink? They will know the right answer to these questions. This will give educated people a better life with a smaller chance of getting diseases or addictions.
Education also counts on your family's involvement. Even if you have a high education but diabetes runs in your family, there will be a higher chance of you developing it.