Yeah by 0.02 % . What got my attention was the fact that his telomeres lenghtened while up there. That is interesting, since our shorten as we age. it is the reason we age. so his lenghtening was interesting to say the least. BUT! after he returned they eventually shortened to the length of his brothers. but for a while he was younger!

I wonder how much of the changes are due to radiation. NASA's statement didn't mention it. I just happened to see a report on the show Seeker about growing plants on the ISS (which Scott Kelly worked on), which made me wonder if the plant DNA is also being effected.
[nasa.gov]

Interesting, isn't it? That will keep the scientists busy for several years, I'm sure.

Gene expression