Eighteen metabolites were identified to be associated with AIS in a study on 99 patients: oleic acid, linoleic acid, cer (d18:0/14:0), cer (d18:0/16:0), arachidonic acid, non-adecanoic acid, docosahexaenoic acid 4-hydroxyproline, pe[18:2(9z,12z)/18:1(9z)], pe[18:2(9z,12z)/18:0], l-palmitoylcarnitine, propionylcarnitine, tetradecanoylcarnitine, l-glutamine, l-arginine, dodecanoylcarnitine, l-proline and decanoylcarnitine [44]. Here, CBLN1 is linked to androgen insensitivity syndrome.