Cetylated fatty acid (or cetyl myristoleate) is a natural substance which helps those who are suffering from arthritis and auto-immune disorders associated with deficiency in Essential Fatty Acids. Cetyl Myristoleate is an ester of fatty acid and Omega 5E is an ester of Omega 5.
See this 2004 study about the effect of Omega 5 oil:
The conclusions of the study are that the Omega 5 fatty acid can help reduce:
Moderate inflammatory pain levels in a variety of joint and muscle diseases.
The analysis of the data also suggests that Omega 5 can reduce disability related to migraine headaches and psoriasis.
Please consult with your physician.