Moving to higher elevation?

I recently moved to the mountains of California and am experiencing some changes in my hair, nails, and even breathing. I know that the air is thinner, and the altitude might be the culprit for my hair being dry along with my skin. But I was also wondering if any of this can effect my nails? They seem to break, and chip a lot easier then they ever have before. Even when I use my vitamin enriched polish. Is that even possible? Thank you!