Actually, that's one area I don't know much about. Since we can't yet easily change our genes, I haven't looked into it much. I'd bet they play a big role. For

Actually, that's one area I don't know much about. Since we can't yet easily change our genes, I haven't looked into it much. I'd bet they play a big role. For example, people probably express (or are sensitive to) different amounts of telomerase and BDNF.