Diets including low-fat, Mediterranean, carbohydrate, omega-3, whey protein, navy bean powder, rice bran, and cruciferous vegetables did not affect telomere length in a meta-analysis.

“so this is a systemic review and meta-analysis they looked at many different diets and they found that there was no  effective diet on telomere length and they looked but they didn't really look at any studies that looked at meat so you can see the different interventions here there was a low weight diet there was a low saturated fat diet there was a mediterranean diet a carbohydrate alpha linolenic acid pufa omega-3 supplement a lot of them there was a whey protein navy bean powder supplemented rice bran supplements cruciferous vegetables none of these lengthened telomeres”