l carnitine for hashimoto's How Goitrogens Affect Role of carnitine in disease

The vasodilatory action of peroxynitrite is enhanced in the presence of GSH, an effect attributed to a guanylate cyclase-dependent mechanism induced by the reaction between GSH and peroxynitrite to form the NO donor S-nitrosoglutathione (GSNO)

The glutathione-related detoxification system is increased in human breast cancer in correlation with clinical and histopathological features

Is any of this a recommendation for human use

The L-isomer is one of the 20 proteinogenic amino acids, i.e

Treating Cancer : Chemotherapy and radiation, used to combat cancer, can destroy cells in the digestive tract, which may cause malabsorption of B12

It also has a solid research base, with studies looking at how blocking NNMT shifts the way cells handle nicotinamide and related methyl-group chemistry (Neelakantan et al., 2018, Biochemical Pharmacology)