Some changes are related to people's transition to primal, but they are not always because of cutting carbs (although that can happen). People may also fling themselves into overexercising, vastly undereat, or do all sorts of things that are certainly not exclusive to doing primal. I belonged to a more conventional diet message board a few years ago, and many of the same problems happened to people there doing traditional low-fat, low-cal diets.
And if you'd read the aging thread, the most likely cause there is someone working a rotating schedule of day and night shifts, which pretty much every medical professional agrees is crap for your health.
(Not sure why I'm responding to this anyhow, because I won't convince you, but there are other people who read this board who might find it helpful.)