I don't know of any scenarios. That certainly doesn't mean that there isn't any, but I haven't seen any in studies or anecdotally that could be directly attribu

I don't know of any scenarios. That certainly doesn't mean that there isn't any, but I haven't seen any in studies or anecdotally that could be directly attributed to change in diet (which is what I'm assuming what you are referring to). Even as I've gotten older I've noticed my cut phases tend to have to run a little longer than they used to, and any bulking I do has to contain better quality food (no more Chik-fil-A binging :(), and I'm pretty sure that is directly related to hormonal changes (free testosterone) for men between the ages of 40-50. It's been a couple of years since I've done a round of no carb, I should give it another round.