<prompt> Answer this question truthfullyWhat causes Low IDL?  <response>: <reason> Life-threatening causes include conditions which may result in death or permanent disability within 24 hours if left untreated.There are no life threatening causes of low IDL.Lipoprotein lipase deficiency StatinsEstrogen plus simvastatin combination therapy Extended-release niacinlaropiprant and simvastatin Familial apolipoprotein AI and apolipoprotein CIII deficiency Lipoprotein lipase deficiency Lovastatin Pravastatin Statins 