"We know that telomere length is, for the most part, genetic but it can also be influenced by environmental factors and changes as well as lifestyle choices. Eating whole plant-plant-based foods and living a healthy lifestyle directly influences telomere length. Also, stress and chronic inflammation are both linked to telomeres becoming shorter. Some things that also contribute to shorter telomeres include chronic stress, obesity, a sedentary lifestyle, smoking, and low socioeconomic status."
We've know about the relationship of diet to telemore length for years. At least I have. For some odd reason, information like this rarely goes mainstream. Even if it did, would the general population alter their diet and lifestyle? In my opinion no. No more so than the longest lived people on Earth would, the plant based people living within the Okinawan archipelago. Their diet is based on sweet potatoes. Very little fish.