It is produced naturally in the body as an assembly of 3 amino acids glycine, cysteine and glutamine
Moreover, IF is contraindicated in patients with specific rare metabolic or genetic disorders, such as pyruvate carboxylase deficiency (PCD) (159), primary carnitine deficiency (PCD) (160), carnitine-acylcarnitine translocase (CACT) deficiency (161), 3-hydroxyacyl-CoA dehydrogenase deficiencies, including both medium-chain (MCHAD) and long-chain (LCHAD) forms (162, 163), medium-chain acyl-CoA dehydrogenase deficiency (MCADD) (164), very-long-chain acyl-CoA dehydrogenase deficiency (VLCADD) (165), and porphyria (166)
Other warnings include: In older adults and people with heart disease, healthcare providers will start treatment at a lower dose to avoid the risk of heart-related side effects, including atrial fibrillation
Additionally, Lilly saw no signs of liver-related safety issues
doi: 10.1097/qad.0000000000001614