Mark Sisson has a new blog post on this topic, offering a few other reasons for higher LDL, both in the long and short term. Includes practical advice to test and correct each idea. With the macronutrient deficiency, supplementing with a thyroid support product that includes iodine, selenium, etc is another option.
http://www.marksdailyapple.com/why-.../#axzz1yvXLrxcT