My daughter-in-law has malignant melanoma and after her first treatment of a year on Interferon, she developed a horrible problem with pain in her legs and hasn't been able to get any relief. Now the malignant melanoma has resurfaced and she's on a new course of chemo that she'll need to be on for five years. Again, she's suffering a lot with her legs. I'd think surely her cancer doctors must know about this carnitine, but maybe not. I'll tell her about it.