S-Adenosyl-L-methionine - 13 C (S-Adenosyl methionine- 13 C) dihydrochloride is the 13 C labeled S-Adenosyl-L-methionine. S-Adenosyl-L-methionine (S-Adenosyl methionine) is an orally active methyl group donor. S-Adenosyl-L-methionine is a dietary supplement with potent antidepressant effects. S-Adenosyl-L-methionine also has anti‑proliferative, pro‑apoptotic and anti‑metastatic roles in cancers. S-Adenosyl-L-methionine has the potential for, cancer , liver disease and osteoarthritis research.