The present study investigated three of the most reported ceramides in ACS studies, Cer (d18:1/16:0), Cer (d18:1/18:0) and Cer (d18:1/24:1), and their plasma ratios to Cer (d18:1/24:0) in patients with different severity of coronary stenosis. Here, CBLN1 is linked to coronary stenosis.