This is going to be an "out there" question, but are you or have you been on a statin drug? This has nothing to do with primal, but those disclaimers in the commercials for these drugs is there for a reason. I know of two people who took statins and it triggered a "rare but serious" autoimmune disease called polymiositis that basically destroyed (over time) the muscle mass in their legs and arms.
One of them is my father. I wouldn't wish this on anyone. Hope I'm way off base with you!