A recent study found that people tend to fall into one of four biological aging pathways, or ageotypes: immune, kidney, liver or metabolic. Metabolic agers, for example, may be at a higher risk for type 2 diabetes as they grow older. Immune agers may generate more inflammation, and therefore be at higher risk for immune-related disease.
It could be that liver and kidney ageotypes may be more prone to liver or kidney diseases, respectively. There are likely other pathways, such as cardio agers who may be more prone to heart attacks, for example, but this study was limited to four main aging pathways. The next step is personalized medicine for aging.
Another study concluded that drinking low-fat milk (both nonfat and 1% milk) instead of whole milk accounted for 4.5 years of less aging in adults.