Longer telomeres tend to shorten faster than shorter telomeres, which are more stable; significant shortening in individuals with initially short telomeres is a negative indicator.

“Not that we're saying you shouldn't get tested but just like know that if you have really long telomeres, the next time you get tested, you're probably going to shorten more than someone who started off with short telomeres. Long telomeres shorten faster, short telomeres are really stable. If you have really short telomeres and they change a lot, you know, that is not a great profile.”