does l'carnitine work The Role of l-Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation Health Benefits of L-Carnitine –
Description
During concurrent treatment with chemotherapeutic drugs and radiation therapy, a prooxidant dose may be useful for achieving synergy

But B12 is involved in complex body wide set of interactions

Amino Acids, 43 (1), 67-76

In research, higher circulating IGF-1 has been associated with an increased risk of certain cancers (such as prostate, breast, and colorectal)
