CBLN1 and COVID-19: Khodadoust et al. focused only on lipids, rather than amino acids, finding that plasma levels of Cer (d18:0/24:1), Cer (d18:1/24:1), and Cer (d18:1/22:0) were markedly increased in COVID-19-positive patients as compared with healthy controls (and indeed further increased in cases of respiratory distress) [32].