By popular request, I am preparing an episode of the HLP on EMFs. It’s a complicated story… but the data on smart phones & the heat & NON-heat related alterations in sperm quality & numbers are straightforward and basically, it’s not a good picture. Why isn’t that more known?

And for those not wishing to conceive, the negative impact of pocket carrying your phone on testosterone levels is robust. I see much on BPAs etc on testosterone levels but the phone-induced problems are where the real data are. @tferriss wrote about this in 4HBody. It’s true.