My LDLs are, at this time, unfortunately, of the predominately small, angry variety instead of the large, fluffy, friendly type. In looking for ways to reverse this situation, I ran accross the connection of Fatty Acids to LDLs.
Also, if fatty acid levels are abnormal, it can cause a whole range of issues, so I recently got aa ARUP Fatty Acids blood test that shows the status of 20 fatty acids. The results are listed for each one and they characterize your status in several ways ( look at the example report) and you also get a really groovy color graph (kinda like a polar graph), link follows:
(after going to link, click on the "Example Report " for "Fatty Acids Profile, Essential Serum or Plasma", test number 2013518 in the table), it is a download.
These acids affect the body in SO many ways, I cannot offer links. Just Google (and pubmed) your particular health issue with "Fatty acids" to see if it is applicable to you.