Your article states, “Exercise, estrogen, [and more examples] all rev up production of new brain cells.” I am compelled to ask: If estrogen leads to neurogenesis, does the “male” hormone testosterone also?
Jaime Hunter Mesquite, Texas
There’s good evidence that testosterone increases neurogenesis in songbirds but little evidence that it does the same in mammals.
From the Nature Index
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.