Do you need to fast to get Rheumatoid Arthritis Factor lab work?
From personal experience, I would say no. I have RA and I had to
have a ton of blood work and none of the times did I have to fast
first. That being said, I would check with your doctor who ordered
the labs to be sure, because new tests develop and the requirements
for different tests may vary.
I am in the same boat and have never been requested to fast
before having tests.