Fiber can have this impact by way of lowering oxidative stress and inflammatory markers in the body—both of which are markers that occur naturally as you age.
To get more protein in your diet, focus on lean sources like poultry, eggs, nuts, Greek yogurt, etc.
Incorporating healthy fat
One major way to do this is by incorporating healthy fats like omega-3 fatty acids into your daily diet.
Eating more plant-based food
Incorporating more of a plant-based diet into your daily life has been shown to slow the aging process in a number of ways, as well.
Whole foods include anything that is in its "natural" form without a lot of processing done to it.
And finally, eating similarly to the traditional Mediterranean diet can help slow your aging process by integrating healthier fats and lowering your intake of ultra-processed foods.