My wife and I have been primal (me to a greater extent than she) since the beginning of the year. We've both noticed a marked difference in the rate of nail growth, and to a lessor extent hair growth. She's also noticed an increase in acne formation. We both supplement with fish oil and your DCMF (usually half doses). As far as I can tell, nail strength isn't a problem. I think it's safe to say that mine feel stronger than they were before. Any thoughts as to why they might grow more slowly, or what might cause the acne to spike?
ADDED: It also seems like minor cuts and abrasions are slower to heal, but that may just be us overthinking things.