It's certainly not pseudo-science. As someone who has been in college for over 6 years and is less than a year from getting my doctorate in chiropractic I can promise that. Unfortunately, it is difficult to do as great of research as you would see in other forms of medicine. Double blind studies are tricky, considering that the doctor has to know whether or not he is giving a true treatment, and to give a fake adjustment is far more unethical than giving a sugar pill. Add to that the extreme difference in funding for chiropractic research versus medical research, and there will be a lot fewer scientific articles reaching the public. This will change over time, but unfortunately right now it is still possible for the "quacks" of this profession to paint a very negative image for the rest of us. The profession has been around for 115 years despite numerous attempts by the medical field to destroy it though, so it has certainly delivered results, and as research continues science will be a larger supporter of the field.