It is almost always low or normal in
CFS.
CFS does NOT have autoimmune damage to the kidneys, which is a very important part of lupus. In 25 years I have never seen someone go from standard CFS to standard lupus, but have seen many people diagnosed with "sort of lupus", "atypical lupus", or "almost lupus". As a topper off, CFS people do not respond to steroids and do not have the same type of arthritis as in lupus.