Even if this were a good study, you couldn't conclude that from it. The conclusion would be that red meat consumption is somehow associated with longer telomere

Even if this were a good study, you couldn't conclude that from it. The conclusion would be that red meat consumption is somehow associated with longer telomere length. Some have speculated that extending telomeres or preventing them from shortening over time can reduce some of the effects of aging, so a diet that preserves telomere length might be good for you, but that also remains to be seen. I don't think the study is very useful because they were essentially just data mining a tiny sample for any kind of apparent correlation from 10+ variables and found one that's barely statistically significant (although the effect size looks substantial, if real).